Is c always the speed of light?


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Savannah Torella 1L
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Is c always the speed of light?

Postby Savannah Torella 1L » Sun Oct 25, 2020 10:12 pm

When using the equation E= hc/ wavelength, is c always going to be the speed of light constant? Are there any instances were c is a different variable?

Meghan Krushena 2E
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Re: Is c always the speed of light?

Postby Meghan Krushena 2E » Sun Oct 25, 2020 10:41 pm

As far as we have learned (unless someone correct me if I am wrong), c is a constant that will always be the set number equal to the speed of light. A constant is an unchanging number, thus c will always be the same value and will always represent that value as the speed of light. The only possibility I can think of as to why c might be a different number is if it undergoes a conversion factor to fit the specific question being asked, but the starting number would still be the same value of c.

Nico Medina
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Re: Is c always the speed of light?

Postby Nico Medina » Sun Oct 25, 2020 10:58 pm

For our purposes, it will always be the speed of light. Hope this helps!

Fernanda Olvera 3D
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Re: Is c always the speed of light?

Postby Fernanda Olvera 3D » Sun Oct 25, 2020 11:07 pm

From what I understood, I agree with both Meghan and Nico, C will always be the speed of light constant.

Caelin Brenninkmeijer 1G
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Re: Is c always the speed of light?

Postby Caelin Brenninkmeijer 1G » Sun Oct 25, 2020 11:07 pm

Since in class "c" has remained the constant for speed of light, I think it's safe to assume that whenever we'd encounter c in a problem/equation that it'd be used as a constant. I think Dr. Lavelle would've specified otherwise if that was the case!

Tobie Jessup 2E
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Re: Is c always the speed of light?

Postby Tobie Jessup 2E » Sun Oct 25, 2020 11:09 pm

From what I understand, the speed of light is always said to be constant c. c is also the fastest speed, so it is telling if an answer to a question is more than the speed of light because it must be incorrect.

Rayna Irving 2C
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Re: Is c always the speed of light?

Postby Rayna Irving 2C » Sun Oct 25, 2020 11:10 pm

I agree with everyone above, from what we have learned so far, c is always a constant used in equations to represent the speed of light.

vuongnaomi1L
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Re: Is c always the speed of light?

Postby vuongnaomi1L » Sun Oct 25, 2020 11:16 pm

Based on what we've learned so far, C would be the speed of light unless the question otherwise specifies

Ethan Goode 2H
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Re: Is c always the speed of light?

Postby Ethan Goode 2H » Sun Oct 25, 2020 11:49 pm

It seems C will always be the constant of the speed of light, which is indicated on Dr. Lavelle's formula sheet.

jordanginyard_
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Re: Is c always the speed of light?

Postby jordanginyard_ » Sun Oct 25, 2020 11:50 pm

yes, C will always represent the speed of the light (3x10^8).

Marco Vivar 3G
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Re: Is c always the speed of light?

Postby Marco Vivar 3G » Sun Oct 25, 2020 11:53 pm

Yes so far C is always light which is a constant at 3*10^8 power. Unless they tell us otherwise

IshanModiDis2L
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Re: Is c always the speed of light?

Postby IshanModiDis2L » Sun Oct 25, 2020 11:54 pm

C is a constant that will not change and it is 3.00x^8

Inderpal Singh 2L
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Re: Is c always the speed of light?

Postby Inderpal Singh 2L » Mon Oct 26, 2020 11:02 am

C will be equal to 3*10^8.

Keeryth Sandhu 1H
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Re: Is c always the speed of light?

Postby Keeryth Sandhu 1H » Mon Oct 26, 2020 4:01 pm

Yes, c is equal to the speed of light and is constant.

Jonathan Batac - 2D
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Re: Is c always the speed of light?

Postby Jonathan Batac - 2D » Mon Oct 26, 2020 4:04 pm

Lavelle emphasized that c is a constant. In the equation c=wavelength.frequency, c is the constant and should always be the speed of light.

Lorraine Medina 3E
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Re: Is c always the speed of light?

Postby Lorraine Medina 3E » Tue Oct 27, 2020 2:49 am

The constant c is the speed of light, 2.99792 x 10^8 m/s, as indicated on the equation sheet.

Adam Bustamante 1I
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Re: Is c always the speed of light?

Postby Adam Bustamante 1I » Thu Oct 29, 2020 5:24 pm

From all the material we've covered, c is always going to be a constant (the speed of light), 2.998x10^8 m/s. In the future maybe there will be another variable, c, that could also be another constant, but until now, just know that its the speed of light!

Brenda Silva 1B
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Re: Is c always the speed of light?

Postby Brenda Silva 1B » Thu Oct 29, 2020 6:31 pm

Based on what we have learned so far, c will be the speed of light constant (2.998x10^8 m/s).

Victoria Dao 3G
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Re: Is c always the speed of light?

Postby Victoria Dao 3G » Thu Oct 29, 2020 7:05 pm

For our purposes and for the equations we know already, yes, C will always be equal to the speed of light, or 3x10^8 m/s. Hope this helps!

Gigi Elizarraras 2C
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Re: Is c always the speed of light?

Postby Gigi Elizarraras 2C » Thu Oct 29, 2020 8:26 pm

C is a constant in the equation such as "h"=6.626*10^-34. So I would continue using the constant as 3*10^8 for the purposes of our use. But as far as momentum equation(p=mv) the velocity changes.

Kathy_Li_1H
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Re: Is c always the speed of light?

Postby Kathy_Li_1H » Fri Oct 30, 2020 4:50 pm

In this class, I believe we only need to know c as the speed of light (given as 2.998E-8 m/s on the reference sheet).

Megan ODonnell 3F
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Re: Is c always the speed of light?

Postby Megan ODonnell 3F » Fri Oct 30, 2020 5:42 pm

We have only used c as the speed of light so far!

Moura Girgis 1F
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Re: Is c always the speed of light?

Postby Moura Girgis 1F » Fri Oct 30, 2020 5:45 pm

Yes! At least so far in Chem14A c is always a constant which represents the speed of light, so it should not change.

YUNALEE
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Re: Is c always the speed of light?

Postby YUNALEE » Sat Oct 31, 2020 11:59 am

Yes, it is because it is a constant!

Violet Kwan 3H
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Re: Is c always the speed of light?

Postby Violet Kwan 3H » Sat Oct 31, 2020 12:58 pm

Yes it is always the speed of light. It is given to us on the formula sheet as 2.99792 x 10^8, so just use that every time you see the variable or need to use the speed of light in calculations :)

Yu Jin Kwon 3L
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Re: Is c always the speed of light?

Postby Yu Jin Kwon 3L » Sat Oct 31, 2020 2:04 pm

Yes, C is the speed of light (a constant). In addition, it's important to note that C is the speed of all the electromagnetic radiation that we've learned thus far (radio, infrared, visible, UV, x-ray, gamma-ray), meaning that the frequency or wavelength does not impact the speed of light; it is always a constant.

Brianna Chen 3F
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Re: Is c always the speed of light?

Postby Brianna Chen 3F » Sat Oct 31, 2020 11:27 pm

Yes, so far in this class, we have only learned that c is equal to the speed of light (3.00x10^8 m/s).

Lauren Strickland 1B
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Re: Is c always the speed of light?

Postby Lauren Strickland 1B » Sat Oct 31, 2020 11:46 pm

Yes for this class c is the speed of light.

Nathan Chu 3H
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Re: Is c always the speed of light?

Postby Nathan Chu 3H » Sat Oct 31, 2020 11:56 pm

According to the formula and constant sheet on the class website, c will always be the speed of light for the purposes of this class. However, there is another constant "C^2" that is called the second radiation constant.

Andrew Yoon 3L
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Re: Is c always the speed of light?

Postby Andrew Yoon 3L » Sun Nov 01, 2020 1:07 am

For now, c will always be equal to the speed of light, which is 3x10^8 m/s.

Jade_Tai_2L
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Re: Is c always the speed of light?

Postby Jade_Tai_2L » Sun Nov 01, 2020 1:10 am

All we need to know for this class is that c=speed of light= 3.0x10^8

Navdha Sharma 3J
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Re: Is c always the speed of light?

Postby Navdha Sharma 3J » Sun Nov 01, 2020 3:02 am

This class requires us to know c as the speed light which is 3 X 10^8 m/s

Jonathan Banh 1G
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Re: Is c always the speed of light?

Postby Jonathan Banh 1G » Sun Nov 01, 2020 4:09 am

In reference to the equation , the variable c should always be representative of the speed of light. The speed of light, c, is generally approximated to 3.00*10^8 m/s, however, more accurately is 2.99792*10^8 m/s. In terms of other cases where c is a considered a different variable, I would think those would be beyond the scope of the case, but I am not too sure. For now, I think there is no need to worry about c being another variable.

James Patanian 2C
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Re: Is c always the speed of light?

Postby James Patanian 2C » Sun Nov 01, 2020 9:17 am

C is the speed of light in a vacuum and for practical purposes for doing calculations in 14a, I’m assuming we will say that it is the speed of light in any case.

Kiara Phillips 3L
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Re: Is c always the speed of light?

Postby Kiara Phillips 3L » Sun Nov 01, 2020 10:21 am

For our purposes, yes. Speed will always be C or 3*10^8 :).

Gian Boco 2G
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Re: Is c always the speed of light?

Postby Gian Boco 2G » Sun Nov 01, 2020 11:21 am

Yep, and it will always equal wavelength * frequency when taken from the EM spectrum

Simi Kapila_3E
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Re: Is c always the speed of light?

Postby Simi Kapila_3E » Sun Nov 01, 2020 11:22 am

Yes for us, c will always be synonymous with speed of light.

Tatyana Bonnet 2H
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Re: Is c always the speed of light?

Postby Tatyana Bonnet 2H » Sun Nov 01, 2020 11:44 am

Yes c will always be the speed of light as its a constant. C=wavelengthxfrequency

Sukhkiran Kaur 3I
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Re: Is c always the speed of light?

Postby Sukhkiran Kaur 3I » Sun Nov 01, 2020 1:27 pm

For us, yes, c will always equal the speed of light.

Isabella Cortes 2H
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Re: Is c always the speed of light?

Postby Isabella Cortes 2H » Sun Nov 01, 2020 1:30 pm

For our purposes, I believe that "c" will always be the speed of light

Will Skinner
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Re: Is c always the speed of light?

Postby Will Skinner » Sun Nov 01, 2020 1:33 pm

C is the speed of light in a vacuum. Light traveling through air is a bit slower.

Catherine Bubser 2C
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Re: Is c always the speed of light?

Postby Catherine Bubser 2C » Sun Nov 01, 2020 1:38 pm

Is there a specific constant for the speed of light through air or should we always assume to use c even if it is not stated a vacuum is present in the equation?

805377003
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Re: Is c always the speed of light?

Postby 805377003 » Sun Nov 01, 2020 2:53 pm

I believe so since it is a constant.

MMorcus2E
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Re: Is c always the speed of light?

Postby MMorcus2E » Sun Nov 01, 2020 3:50 pm

Yes, c is the speed of light. I originally had the same question too, but since this equation solves for the energy of a photon, which is basically a tiny package of light energy which travels at the speed of light, then c would have to be the speed of light.

Jonathan Malau 1F
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Re: Is c always the speed of light?

Postby Jonathan Malau 1F » Sun Nov 01, 2020 3:53 pm

Based on the equation c=λv, c is always the speed of light.

Kat Stahl 2K
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Re: Is c always the speed of light?

Postby Kat Stahl 2K » Sun Nov 01, 2020 3:55 pm

In this class I think that c will only be used to represent speed of light yes.

DPatel_2L
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Re: Is c always the speed of light?

Postby DPatel_2L » Sun Nov 01, 2020 4:18 pm

For our uses yes it is.

Charmaine Ng 2D
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Re: Is c always the speed of light?

Postby Charmaine Ng 2D » Sun Nov 01, 2020 4:27 pm

In this class at least, c will always be the speed of light! :))

simona_krasnegor_1C
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Re: Is c always the speed of light?

Postby simona_krasnegor_1C » Sun Nov 01, 2020 6:22 pm

As stated before, c is the speed of light always!

Namratha Gujje
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Re: Is c always the speed of light?

Postby Namratha Gujje » Sun Nov 01, 2020 6:26 pm

Yes, for this equation c will always be the speed of light.

LovepreetSran_3H
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Re: Is c always the speed of light?

Postby LovepreetSran_3H » Sun Nov 01, 2020 6:32 pm

Yes, c will always be the speed of light.

Melanie Krahn 1C
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Re: Is c always the speed of light?

Postby Melanie Krahn 1C » Sun Nov 01, 2020 7:17 pm

C always equals the speed of light, it will never equal another variable when doing the work we do.

Sheryl Ocampo 1D
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Re: Is c always the speed of light?

Postby Sheryl Ocampo 1D » Sun Nov 01, 2020 7:19 pm

yes, c is always the speed of light, it doesn't vary

sabrina ghalambor 2J
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Re: Is c always the speed of light?

Postby sabrina ghalambor 2J » Sun Nov 01, 2020 7:22 pm

yes, c is a constant always equal to 3 x 10^8 m/s

josephspindler2H
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Re: Is c always the speed of light?

Postby josephspindler2H » Sun Nov 01, 2020 7:59 pm

Yes, the constant c will remain a constant 2.99792 x 10^8 m/s. c will always refer to the speed of light for the purposes of our classes (as far as I am aware).

Diana Aguilar 3H
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Re: Is c always the speed of light?

Postby Diana Aguilar 3H » Sun Nov 01, 2020 8:02 pm

Yes, like everyone else has stated, C is always going to represent the speed of light.

Mina Tadros 3L
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Re: Is c always the speed of light?

Postby Mina Tadros 3L » Sun Nov 01, 2020 8:02 pm

Yes, c will always be the speed of light. It is constant, after all. The reason why it is a constant is due to the inverse relationship between wavelength and frequency. Whenever you double wavelength, you are halving the frequency, and when you multiply these two values together, you will always obtain the speed of light (3.00x10^8 m/s).

TiffanyBrownfield 2I
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Re: Is c always the speed of light?

Postby TiffanyBrownfield 2I » Sun Nov 01, 2020 8:04 pm

Like what everyone else is saying, c is a variable specific to the speed of light. If velocity were supposed to be another value, it would typically be expressed with the variable (v).

jia207
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Re: Is c always the speed of light?

Postby jia207 » Sun Nov 01, 2020 10:34 pm

Yes, c will always be the speed of light. The full length number for c can be found on his equation sheet.

Yolanda_Xing_3A
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Re: Is c always the speed of light?

Postby Yolanda_Xing_3A » Sun Nov 01, 2020 10:50 pm

yes, light is always 3x10^8 m/s in vacuum

Anastasia Yulo 1C
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Re: Is c always the speed of light?

Postby Anastasia Yulo 1C » Sun Nov 08, 2020 11:31 am

In this class, you can always count on c being the speed of light.

Sabrina Galvan 3J
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Re: Is c always the speed of light?

Postby Sabrina Galvan 3J » Sun Nov 08, 2020 8:59 pm

Yes, and it will always be the product of the wavelength and frequency.

Rachel Kho Disc 2G
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Re: Is c always the speed of light?

Postby Rachel Kho Disc 2G » Sun Nov 08, 2020 9:10 pm

Yes, c is a constant equal to 3*10^8 m/s, and it is commonly used in equations c=(lambda)(nu)...in other words, wavelength*frequency. Another side note: the speed of light is lower case c. Please do not confuse it with C as in Celsius or C as in carbon!

Joanna Huang
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Re: Is c always the speed of light?

Postby Joanna Huang » Sun Nov 08, 2020 9:59 pm

Yep, c in chemistry will always be known as the constant for the speed of light.

Adrienne Chan 1G
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Re: Is c always the speed of light?

Postby Adrienne Chan 1G » Sun Nov 08, 2020 10:05 pm

The speed of light will always be represented by c (so far as I know!). However, the actual speed of light changes depending on what material it travels through. The constant c is the speed of light in a vacuum, but it will change if it's going through a different material.

Juliana Rosales 1H
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Re: Is c always the speed of light?

Postby Juliana Rosales 1H » Sun Nov 08, 2020 10:39 pm

yes. Its either going to be that one constant, or you'll be given the info to calculate whatever number they want you to

Dane_Beasley_1E
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Re: Is c always the speed of light?

Postby Dane_Beasley_1E » Sun Nov 15, 2020 10:17 pm

Yes, I do believe that the speed of light will always be represented as the constant c.

Bai Rong Lin 2K
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Re: Is c always the speed of light?

Postby Bai Rong Lin 2K » Sun Nov 15, 2020 11:29 pm

Savannah Torella 1L wrote:When using the equation E= hc/ wavelength, is c always going to be the speed of light constant? Are there any instances were c is a different variable?

I think based on this class, it would always be used for speed.

Teti Omilana 1G
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Re: Is c always the speed of light?

Postby Teti Omilana 1G » Sun Nov 15, 2020 11:35 pm

Yes, the constant c is always going to represent the speed of light in that equation. (c=3x10^8 m/s)

Sam Wentzel 1F 14B
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Re: Is c always the speed of light?

Postby Sam Wentzel 1F 14B » Sun Nov 15, 2020 11:38 pm

c will always be equal to the speed of light. The speed of light does not change in a vacuum, unless acted upon by gravity. In the c = lambda nu equation, we assume we are in a vacuum with negligible gravitational force acting on the light.

Hope this helps!

Mehreen 3I
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Re: Is c always the speed of light?

Postby Mehreen 3I » Sun Nov 15, 2020 11:40 pm

C will always be the speed of light :)

105618850
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Re: Is c always the speed of light?

Postby 105618850 » Wed Dec 02, 2020 2:12 am

I believe it is safe to say that the only constant c we will be encountering for the time being will concern the speed of light.

Megan Hulsy 1A
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Re: Is c always the speed of light?

Postby Megan Hulsy 1A » Wed Dec 02, 2020 8:50 am

Yes, it is a constant and is the speed of light.

CesarLec1
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Re: Is c always the speed of light?

Postby CesarLec1 » Sun Dec 06, 2020 1:18 am

Based on the formulas and constants sheet, c in this class will stand for the speed of light.

Jaden Joodi 3J
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Re: Is c always the speed of light?

Postby Jaden Joodi 3J » Sun Dec 06, 2020 2:14 am

c is always the speed of light as long as it is in a vacuum. If it is the speed of light not it a vacuum, then it varies.

David Liu 1E
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Re: Is c always the speed of light?

Postby David Liu 1E » Sun Dec 06, 2020 2:36 am

for this class c is always the constant value for speed of light!

Yuehan_Wu_3K
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Re: Is c always the speed of light?

Postby Yuehan_Wu_3K » Sun Dec 06, 2020 6:58 pm

Yes I think for what we've learnd so far, c is always the speed of light.

Arnav Saud 2C
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Re: Is c always the speed of light?

Postby Arnav Saud 2C » Sun Dec 06, 2020 7:56 pm

c will always be the constant for the speed of light(at least for this class).

Joanne Yuh 3I
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Re: Is c always the speed of light?

Postby Joanne Yuh 3I » Sun Dec 06, 2020 8:00 pm

Yes, c is always the speed of light and it will not change based on the topics we have learned so far. The wavelength and frequency values will change to equal to the speed of light.

Madeline Marron 1I
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Re: Is c always the speed of light?

Postby Madeline Marron 1I » Sun Dec 06, 2020 8:02 pm

since the speed of light is a constant (c) it will always be the same number

Adrienne Chan 1G
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Re: Is c always the speed of light?

Postby Adrienne Chan 1G » Sun Dec 06, 2020 8:06 pm

In this class, c will always be the speed of light. Although this is technically the speed of light in a vacuum and light will travel slower through other substances, in this class we will just use this optimal maximum value.

Simran Bains 2C
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Re: Is c always the speed of light?

Postby Simran Bains 2C » Sun Dec 06, 2020 8:06 pm

From what we have learned I believe c is always the speed of light.

AHUNT_1A
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Re: Is c always the speed of light?

Postby AHUNT_1A » Sun Dec 06, 2020 8:07 pm

Yes c is always the speed of light.

Jeremy Wei 2C
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Re: Is c always the speed of light?

Postby Jeremy Wei 2C » Sun Dec 06, 2020 8:57 pm

Yeah I believe c will always be the speed of light!

Brandon Gruender 3F
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Re: Is c always the speed of light?

Postby Brandon Gruender 3F » Sun Dec 06, 2020 9:03 pm

In this case, this will only be the speed of light. It may change in future classes (I'm not sure), but for now this is the speed of light. The constant is around 3 x 10^8

Carly_Lipschitz_3H
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Re: Is c always the speed of light?

Postby Carly_Lipschitz_3H » Mon Dec 07, 2020 10:42 am

When using the equation E=hc/wavelength, c is always going to be the speed of the light constant. This constant is approximately 3 x 10^8 m/s. There are no instances in E=hc/wavelength for which c will be a different variable.

Brian Acevedo 3H
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Re: Is c always the speed of light?

Postby Brian Acevedo 3H » Thu Dec 10, 2020 10:18 pm

In the context of this class, the constant "c" will always refer to the speed of light, which is approximately 2.99792 x 108 meters per second.

Simrah_Ahmed1J
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Re: Is c always the speed of light?

Postby Simrah_Ahmed1J » Thu Dec 10, 2020 10:30 pm

Yes, I think you can be completely sure to use c when you're talking about energy because it is in the form of photons and it is always light and therefore always has the speed c.

Jaclyn Schwartz 1I
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Re: Is c always the speed of light?

Postby Jaclyn Schwartz 1I » Wed Dec 16, 2020 10:52 am

For this course, c will always be a constant and represent the speed of light


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