Question

To observe diffraction, the size of the obstacle:

• A. has no relation to wavelength.
• B. should be $\lambda /2$, where $\lambda$ is the wavelength.
• C. should be much larger than the wavelength.
• D. should be of the order of wavelength.

Answer 1

The correct option is D should be of the order of wavelength.

The phenomenon of diffraction is observed when the size of obstacle is of the order of wavelength due to wave nature of light.