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Please answer the question below in a clean and correct manner as quick as you can

. Questions  are associated to Introductory Quantum Mechanics.

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The Davisson-Germer experiment provided a strong evidence supporting the wave na-
ture of electron. Consider an electron with momentum p = 8 x 10 eV/c (c is the
speed of light) injected onto a crystal target, with an angle 0, as shown in the picture
below. The de Broglie wave of the electron could reflect on different layers of the crys-
tal lattice, and exhibits interference effects when it gets reflected. The lattice spacing
is a ~ 0.1 nm.
What is the possible value of sin ( for constructive interference effect to occur
in the outgoing electron wave?
Useful constants of nature for answering the above questions are:
c = 3 x 105 m/s is the speed of light.
h ~ 4x 10 15 eV - s is Planck constant.
1m=10# nm.

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Subject: Physics, Science

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