Please do question 3 only. Bragg\' relation (2) is the following: Questions Pre-

Question

Please do question 3 only.
Bragg' relation (2) is the following:
Questions Pre-laboratory assignment 1. Geometric analysis Using the Figure 5 below, find a geometric relation between D, L and angle in triangle OAB. You may assume that the angle is small. A 20 -tan carbon target D/2. 2. Express the wavelength of the electron as a function of the accelerating potential Va using the de Broglie relation (1) and relation (3) 2e Va (3 wavelength of the electron as a function of using Bragg's relation (2). press the relation between and to keep in mind the Electron Diffraction

Explanation / Answer

From Bragg's Law,

lambda = 2 d sin(theta)

theta = 90 - phi

lambda = 2 d sin(90 - phi)

lambda = 2 d cosphi

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