Question

An X-ray beam of wavelength 10-10m falls on a crystal of atomic spacing 2 x 10-10. The Bragg'* angle for the second order reflection will be

(a) 45°

(b) 15°

(c) 60°

(d) 30°

Answer 1

The correct option is (d).

Explanation:

Given: Wavelength (λ) = 10-10 m and atomic spacing (d) = 2 x 10-10 m. From the Bragg'* law,