Homework Help: Physics

Posted by Abby on Thursday, April 7, 2011 at 5:50pm.

Electrons in a beam incident on a crystal at an angle of 30ͦ have kinetic energies ranging from zero
to a maximum of 5500 eV. The crystal has a grating space d=0.5 Aͦ, and the reflected electrons are
passed through a slit .Find the velocities of the electrons passing through the slit. How many are these
velocities?

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