Two sitar strings A and B are slightly out of tune and produce beats of frequency 6 Hz. When the tension in string A is slightly decreased, the beat frequency is found to be reduced to 3 Hz. If the original frequency of A is 324 Hz, the frequency of B is

Arrange the following electromagnetic radiations with correct decreasing order of their associated frequencies from the code given below:

(i) Infra-red radiation

(ii) Microwave radiation

(iii) Ultra-violet radiation

What is the name of the principle which states that each point on a wavefront acts as a source of secondary wavelets that spread in all directions and form a new wavefront?

Who, in 1816, modified Newton's formula for the speed of sound to take into account adiabatic compression in air?

Which type of wave is a sound wave in air?

What is required for the generation of a sound wave?

What is the nature of wavefront from a point source in an isotropic medium?

The crest of a wave is the point where the disturbance is at:

Which type of wave is primarily formed on a stretched string when plucked or disturbed?