## Energy of photon [ENDORSED]

$E=hv$

diana_calderon_4L
Posts: 50
Joined: Thu Sep 27, 2018 11:26 pm

### Energy of photon

When it comes to energy of a photon, there is a specific equation to calculate it right??

Chem_Mod
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### Re: Energy of photon

Yes, E = hv or E = hc/$\lambda$.

Catherine Kim 3K
Posts: 31
Joined: Thu Sep 27, 2018 11:26 pm

### Re: Energy of photon

Yes! You would use E=hv

g orloff 1J
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Joined: Thu Sep 27, 2018 11:16 pm

### Re: Energy of photon

use E=hv for energy of a photon

Henry_Phan_4L
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Joined: Thu Sep 27, 2018 11:24 pm

### Re: Energy of photon

Chem_Mod wrote:Yes, E = hv or E = hc/$\lambda$.

How did you get that second equation?

Yiting_Gong_4L
Posts: 55
Joined: Thu Sep 27, 2018 11:25 pm

### Re: Energy of photon

When would we use E=ch/wavelength instead of E=hv, vice versa?

ryanhon2H
Posts: 48
Joined: Thu Sep 27, 2018 11:28 pm

### Re: Energy of photon  [ENDORSED]

Henry_Phan_3B wrote:
Chem_Mod wrote:Yes, E = hv or E = hc/$\lambda$.

How did you get that second equation?

You substitute for v in E=hv to get E=hc/λ

Use the light equation c = vλ, solve for v to get v = c/λ, and substitute back into E=hv for v

NatBrown1I
Posts: 43
Joined: Thu Sep 27, 2018 11:17 pm

### Re: Energy of photon

Depending on the specific variables that you have you can use either the equation:
E= hv
or
E = hc/ lambda

The second equation is just a combination of the first equation and lambda = c/v.