1.33 HW Confusion (part a)

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

1.33 HW Confusion (part a)

Postby Rosamari Orduna 1D » Sun Apr 22, 2018 6:48 pm

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)

Postby Chem_Mod » Sun Apr 22, 2018 7:19 pm

You are correct. Use de Broglie.

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

Re: 1.33 HW Confusion (part a)

Postby Emely Reyna 1F » Sun Apr 22, 2018 8:10 pm

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


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