Speed of Light

[Emmanuel Ogunrinde 3L]

Is speed of light a constant (3*10^8) or does it ever change?

[Clarissa Nava 3H]

It does not change it will always be 3*10^8

[AustinGrove3B]

more specifically 2.99792 x 10⁸. I think in the book they use this (more sig figs) than 3.0 x 10⁸

[Maya_Peterson1C]

I did some research behind it, and some sources are claiming that recent studies show light doesn't always travel at the speed proposed by Einstein's theory. However, for the purposes of this class the speed of light is assumed to be constant.

[Manya Kidambi 3I]

You should treat it as a constant in any sort of calculations done for this class. I’m sure for higher level chemistry this would be different, but at this point I wouldn’t worry.

[Ruiting Jia 4D]

more specifically 2.99792 x 10⁸. I think in the book they use this (more sig figs) than 3.0 x 10⁸

Would it be advisable to calculate using 2.99792 x 10^8 on the exams? I'm not sure when to apply significant figures - either throughout the problem or just for the final answer.

[404817859]

sig figs will give more of an precise answer, either way should work :)

[405098546]

For the purposes of this class the speed of light probably will always stay the same. Though I think in certain mediums like water or glass the light of speed can change.

[Dhwani Krishnan 1G]

the speed of light changes with the medium, in air it is 3.0x10^8m/s.

[Timothy_Yueh_4L]

Just wanted to add that the speed of light is constant throughout the entire electromagnetic spectrum (~3.00 * 10^8 m/s)

[Diana Sandoval 1K]

It's assumed to be a constant and from my knowledge I believe we will be given the constant.

[Anjali 4A]

Will we be provided all of these constants/equations during the tests, midterms and final?

[Danny Zhang 4L]

Will we be provided all of these constants/equations during the tests, midterms and final?

I am sure that we will get a cover sheet with all of the constants/equations as we did on the first test on all future tests as well.

[Connie Chen 3D]

The speed of light is a constant, therefore it will never change. You can, however, convert it to other units if you wish, as long as all the correct units cancel out.

[janessadai 1F]

The speed of light is always constant, and we are provided the value during tests and exams so we can just use whatever value they give us

[isarose0]

The speed of light is constant and will not change, there may be a more specific value, however, it is most commonly known as 3x10^8 m/s

[Aleeque Marselian 1A]

I'm pretty sure that for this class, we treat the speed of light as a constant all the time.

[405098546]

Speed of light is constant

[davidryan3f]

light always travels at the same speed regardless of wavelength or amplitude. it is a constant.

[Zachary Menz 1D]

The speed of light is constant, and is represented in class as c = 3.00 x 10^8 m/s

[Radha Patel 4I]

The speed of light is constant, it helps maintain the equation c= wavelength x frequency by allowing wavelength and frequency to be inversely related.

[Sisi Li 1F]

In the context of this class, it should always be treated as a constant.

[Shutong Hou_1F]

The speed of light is constant in vacuum, and the speed is 3*10^8 m*s^-1, which would also be generally used in solving general problems. However, the speed would actually be a little bit slower when there is air, whereas we generally ignore this difference between the idea and the fact in our calculations for this course.

[alexfwang3g]

The speed of light is always constant.

[Ashley Fang 2G]

Speed of light is a constant and will be given during tests/exams.
The link of the constants and equations sheet is on his website but I'll link it here!

https://lavelle.chem.ucla.edu/wp-conten ... ations.pdf

[Brandon Tao 1K]

It does not change, so it is a constant

[stephaniekim2K]

3.00 x 10^8 is the speed of light inside a vacuum.

[Natalie C 1K]

the speed of light is constant ! because it will never change

[Rohan Kubba Dis 4B]

Unless we are not in a vacuum, the speed of light will stay constant at 3.0 x 10^8 m/s.

[HuyHa_2H]

The speed of light won't because it's a constant but sometimes they might be displayed differently due to sig figs and rounding and whatnot.

[Merin Padayatty 3G]

The speed of light is a constant as it doesn't change.

[Sally Qiu 2E]

the speed of light changes depending on the medium it is traveling through; however, the constant 3.00x10^8 m/s is used when assuming the light is traveling through a vacuum. therefore, in our case, the speed of light is constant.

[Rodrigo2J]

The speed of light is a constant so you don't have to worry about it changing.

[Emil Velasco 1H]

The speed of light (3. 10^8 m/s) will always be a constant.

[Pablo 1K]

No need to worry for the sake of problems, light constant will not change.

[Brian J Cheng 1I]

For the purpose of this class we'll assume the speed of light (c) to be roughly 3.00 x 10^8 m/s. Light travels at different speeds through different mediums, but we'll use the vacuum measurement for our calculations

[Gilberto Millan 1F]

This is also something that I was considering. Using the constant as 2.998*10^8 m/s, the book gives two examples of determining wavelengths on page 5. I was wondering why they didn't give any background information on the constant? But overall the responses were helpful.

[Rosa Munoz 2E]

It is a constant.

[705379941]

speed of light is a constant!

[Trent Yamamoto 2J]

The speed of light is a constant (3*10^8) and is always reflected as so on the constant sheet.

[Amir Bayat]

The speed of light will not change. It is consistently 3.8 *10^8.

[Lara Kristine Bacasen 1L]

C is a constant but of course although it is widely accepted this constant assumes particular conditions like how light particles has no resting mass. There is also quantum field theory that argues the vacuum isn't always empty and has elementary particles that pop in and out if existence which can cause changes in the speed of light.