If an X-ray beam of wavelength 1.4 × 10^-10 m makes an angle of 20° with a set of planes in a crystal causing first order constructive interference, at what angle will the second order line appear? A)40° B)20° C)43° D)4° E)11°

Question

Quizplus · Accepted Answer

The Bragg's law equation is nλ = 2d sin θ. For the first order (n=1), the angle is 20°. For the second order (n=2), we solve for θ using the same d and λ, resulting in θ ≈ 43°.

If an X-Ray Beam of Wavelength 1