Combining E=hv and c=ƛv  [ENDORSED]


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Jose Lupian 1C
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Combining E=hv and c=ƛv

Postby Jose Lupian 1C » Sun Apr 15, 2018 10:45 pm

This past lecture Professor Lavelle showed an example where he combined E=hv and c=ƛv. This lead to the equation E=hc/ƛ. How did this combination result in this final equation?

Chem_Mod
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Re: Combining E=hv and c=ƛv  [ENDORSED]

Postby Chem_Mod » Mon Apr 16, 2018 11:40 am

Solve for v and plug v into E= hv.

Isobel Tweedt 1E
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Re: Combining E=hv and c=ƛv

Postby Isobel Tweedt 1E » Mon Apr 16, 2018 1:06 pm

v = c/ƛ so E = hc/ƛ

Steven Luong 1E
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Re: Combining E=hv and c=ƛv

Postby Steven Luong 1E » Wed Apr 18, 2018 7:07 pm

So we have E = hv, where h is Planck's constant and v is the frequency. We have c = ƛv where ƛ is the wavelength, c is the speed of light while v is also frequency. If we solve for v in c = ƛv we will get v = c/ƛ. Now we can plug that into E = hv where we will get E = hc/ƛ.

Elena 1H
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Re: Combining E=hv and c=ƛv

Postby Elena 1H » Sun Apr 22, 2018 4:46 pm

from c=λv you solve for v and get v=c/λ. You substitute c/λ for v in the E=hv equation and get E=hc/λ

Rummel Requerme 1E
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Re: Combining E=hv and c=ƛv

Postby Rummel Requerme 1E » Sun Apr 22, 2018 8:47 pm

First, you solve for v in the second equation, then plug that into E=hv.

shouse1I
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Re: Combining E=hv and c=ƛv

Postby shouse1I » Sun Oct 14, 2018 6:08 pm

Will the value of c normally be given for use of the equation E=hc/ƛ?

Alexandra Albers 1D
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Re: Combining E=hv and c=ƛv

Postby Alexandra Albers 1D » Sun Oct 14, 2018 6:47 pm

c is a constant, and it is likely that the value of it will be given to us in the equation sheet provided by Dr. Lavelle, but it might be useful to memorize it anyway.


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