$\lambda=\frac{h}{p}$

Joe Rich 1D
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The question asks for the wavelength of an electron that was ejected from a metal surface with a velocity of 3.6 x 10^-3 km/s. I know that one way to solve this is by using the De Broglie equation, but I was just wondering if it was possible to solve this by solving for Kinetic Energy of the electron (KE=0.5mv^2), and plugging this energy into the equation E=vh/λ. Thanks!

Dabin Kang 1B
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The question doesn't ask for the wavelength of an ejected electron. It asks for the wavelength of the photon that caused the ejection of an electron.

Joe Rich 1D
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Part a actually does ask for the wavelength of the electron I think.

Dabin Kang 1B
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Oh, I thought you were asking about part C. You would use $\lambda =\frac{h}{p}$ to solve for the wavelength. How did you get E=vh/λ ?

Joe Rich 1D
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