## HW 1A.9 [ENDORSED]

$c=\lambda v$

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Henri_de_Guzman_3L
Posts: 88
Joined: Fri Sep 28, 2018 12:25 am

### HW 1A.9

For this problem, if I know the frequency and the wavelength, how do I find the energy of the photon? Is there a specific formula?

MaiaRodriguezChoi3E
Posts: 32
Joined: Fri Sep 28, 2018 12:25 am

### Re: HW 1A.9

I think you use E=hc/wavelength which was an equation we derived last lecture from E=hv and c=wavelength x v

Megan Gianna Uy 3L
Posts: 30
Joined: Fri Sep 28, 2018 12:26 am

### Re: HW 1A.9

In order to find the energy, use the formula E=hv, since the frequency is given.

Sana_Mian_3G
Posts: 30
Joined: Fri Sep 28, 2018 12:23 am

### Re: HW 1A.9

E = hf = hc/λ. This is the equation that is needed and the constant needed is h = 6.62608 × 10^–34 J.s

Fionna Shue 4L
Posts: 59
Joined: Fri Sep 28, 2018 12:18 am

### Re: HW 1A.9  [ENDORSED]

If you know the frequency (v), you can find the energy using the equation E=hv where h=6.626*10^-34 J.s. If you know the wavelength (λ), you can find the energy using the equation E=hc/λ where c=2.997*10^8m.s^-1.

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