## 1.33 HW Confusion (part a)

Rosamari Orduna 1D
Posts: 31
Joined: Fri Apr 06, 2018 11:04 am

### 1.33 HW Confusion (part a)

1.33 The velocity of an electron that is emitted from a
metallic surface by a photon is 3.6 * 10^3 km*s-1. (a) What is the wavelength of the ejected electron? (b) No electrons are emitted from the surface of the metal until the frequency of
the radiation reaches 2.50 * 10^16 Hz. How much energy
is required to remove the electron from the metal surface?

I need a refresher as to what equation to use for this problem for part a? I think its De Broglie's but am not 100% sure...

lambda=h/m*v

Chem_Mod
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### Re: 1.33 HW Confusion (part a)

You are correct. Use de Broglie.

Emely Reyna 1F
Posts: 30
Joined: Fri Apr 06, 2018 11:04 am

### Re: 1.33 HW Confusion (part a)

Yes, to find the wavelength you can use the de Broglie relationship, since you are given the velocity and know that the mass of the electron is 9.10 x 10^-28