Question: A metal surface with a work function of 3 . 2 1 0 1 9 J is struck with blue light, and electrons are released.

A metal surface with a work function of 3.21019 J is struck with blue light, and electrons are released.
13.(6 points) If the maximum kinetic energy of the ejected electrons is 2.21019 J, what is the
minimum wavelength of ejected electrons? The mass of an electron is 9.111031 kg. Hint: the
kinetic energy of a particle, , can be expressed in terms of its momentum, , as =2
2, where
is the mass of the particle.
A)2.31028 m
B)3.01015 m
C)3.31015 m
D)1.0109 m
E)1.7109 m

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