Question

A: Radio wave can diffract at the edges of buildings
B: X-rays can diffract at the interiors of a crystal

• A. A is true, B is false
• B. Both A and B are true
• C. A is false, B is true
• D. Both A and B are false

Answer 1

The correct option is B Both A and B are true

Diffraction overs when the size of obstacle is comperable to the wavelength of the incident waves . For radio wave , wavelength is of the order of ${10}^2$ ; while for $x-rays$ , wavelength has an order of $\sim {10}^{-6}$ m.