Einstein Equation

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Yazmin Bocanegra 3L
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Joined: Thu Jul 25, 2019 12:17 am

Einstein Equation

Postby Yazmin Bocanegra 3L » Wed Nov 06, 2019 1:09 pm

What do the "h" and "v" stand for in Einstein's equation, E=hv?

Michael Nguyen 1E
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Joined: Sat Aug 17, 2019 12:17 am

Re: Einstein Equation

Postby Michael Nguyen 1E » Wed Nov 06, 2019 1:12 pm

The h stands for Planck's constant, which is provided on the constants sheet.
The v stands for the frequency of EM radiation that is being used in the calculation.

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Re: Einstein Equation

Postby 105289321 » Sat Dec 07, 2019 9:38 pm

Plancks constant and frequency

Leyla Anwar 3B
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Re: Einstein Equation

Postby Leyla Anwar 3B » Wed Oct 14, 2020 5:34 pm

In E=hv,
h = planck's constant --> 6.626 x 10^-34 ; since this is a constant it will always be this value
v = frequency (Hz)

Michael Sun Dis 3G
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Joined: Wed Sep 30, 2020 9:37 pm

Re: Einstein Equation

Postby Michael Sun Dis 3G » Thu Oct 15, 2020 7:24 pm

The "h" is Planck's constant, around 6.626x10^-34 Js. The "v" is the frequency of the photon.

Becca Nelson 3F
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Re: Einstein Equation

Postby Becca Nelson 3F » Thu Oct 15, 2020 7:38 pm

These variables are h for Planck's constant (6.6.26 x 10^-34) and v for frequency. The v for frequency can also be seen in c=(wavelength)(v). With the only terms in E=hv being a constant and v, we see how it does not matter the intensity of the light but only the frequency. This goes back to Dr. Lavelle's analogy about the cross country runners and the barrier. Hope this helps :)

Crystal Pan 2G
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Re: Einstein Equation

Postby Crystal Pan 2G » Thu Oct 15, 2020 8:48 pm

E= hv

h= planck's constant

v(nu)= frequency (Hz or )

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Re: Einstein Equation

Postby Jason_John_2F » Fri Oct 16, 2020 12:10 am

h is planck's constant which is always 6.62607015×10−34 js and v is the frequency which is how often a wave passes a given point per second.

Sophia Kalanski 1A
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Re: Einstein Equation

Postby Sophia Kalanski 1A » Fri Oct 16, 2020 5:23 pm

h stands for the plank constant and the v stands for the frequency. You can also, if you need to find the wavelength, use the frequency (v) and rewrite it as c/wavelength. This will get you E=hc/wavelength. C is the speed of light in the vacuum which is a constant and it is 3.00*10^8

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Joined: Wed Sep 30, 2020 9:32 pm

Re: Einstein Equation

Postby LeanneBagood_2F » Fri Oct 16, 2020 7:48 pm

Adding on to this question, is there a specific way we should be writing the "v" or frequency in the equation E = hv? Every lecture I get a bit confused because the symbol for frequency looks exactly like "v" for velocity and i'm not too sure how to make a distinction.

Hasan Mirza 3F
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Re: Einstein Equation

Postby Hasan Mirza 3F » Sun Oct 18, 2020 10:55 pm

The ν used for frequency is the greek letter "nu" which looks almost identical to a v. I think for the most part problems should be pretty clear on what is being asked for, such as when a wavelength is given.

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