A wave enters to water from air. In air frequency, wavelength, intensity and velocity are n₁, λ₁, l₁ and v₁ respectively. In water the corresponding quantities are n₂, λ₂, l₁and v₂ respectively, then:

Two waves are said to be coherent, if they have:

What is the effect of humidity on sound waves when humidity increases?

A transverse wave propagating along x-axis is represented by

where x is in metre and t is in second. The speed of the wave is:

Two trains move towards each other with the same speed. The speed of sound is 340 m/s. If the height of the tone of the whistle of one of them heard on the other changes times, then the speed of each train should be:

The equation of a wave is given by

, where x and y are in metre and t in second, then velocity of wave is:

A cylindrical resonance tube open at both ends, has a fundamental frequency ƒ, in air. If half of the length is dipped vertically in water, the fundamental frequency of the air column will be:

A transverse wave is represented by the equation

For what value of λ is the maximum particle velocity equal to two times the wave velocity?

With the propagation of a longitudinal wave through a material medium, the quantities transmitted in the propagation direction are:

A star  emitting radiation at a wavelength of 5000Å is approaching the earth with a velocity of 1.50 × 10⁶ m/s. The change in wavelength of the radiation as received on the earth is: