Assertion : No diffraction is produced in sound waves near a very small opening.
Reason : For diffraction to take place, the aperture of opening should be of same order as wavelength of waves.

Options

A. (a) If both assertion and reason are true and reason is the correct explanation of assertion.
B. (b) If both assertion and reason are true but reason is not the correct explanation of assertion.
C. (c) If assertion is true but reason is false.
D. (d) If assertion and reason both are false.

Answer

A

Explanation

The diffraction of sound is only possible when the size of opening should be of the same order as its wavelength and the wavelength of sound is of the order of `1.0m`, hence, for a very small opening no diffraction is produced in sound waves.