Question

Beats are produced at the regions of –

• A. Constructive interference
• B. Destructive interference
• C. Both constructive and destructive interference
• D. None of these

Answer 1

Answer: (A)

Constructive interference

Answer 2

v =$\sqrt{(\gamma P/\rho)}$, the density r of moisture is less than the density of air. Hence, the presence of moisture in air lowers the density. So, the velocity of sound in air increases.