Standing wavesare produced in a 10 m long stretched string.  If the string vibrates in 5 segments and the wave velocity is 20 m/s, the 5 segments and the wave velocity is 20 m/s, the frequency is

A star which is emitting radiation at a wavelength of 5000 is approaching the earth with a velocity of 1.50 x10⁶ m/s. The change in wavelength of the radiation as received on the earth is

A pulse of a wave train travels along a stretched string and reaches the fixed end of the string.  It will be reflected back with

A standing wave is represented by y =a sin (100t ) cos (0.01)x, where y and a are in millimetre, t in seond and x is in metre.  Velocity of wave is

An observer moves towards a stationary  source of sound with a speed of the speed of sound . The wavelength and frequency of the source emitted are respectively.  The apparent frequency and wavelength recorded by the observer are respectively

The phase difference between two waves represented by

where x is expressed in metre and t is expressed in second, is approximately

Two waves of same frequency and intensity superimpose on each other in opposite phases.  After the superposition, the intensity and frequency of waves will

A car is moving towards a high cliff.  The car driver sounds a horn of frequency f.  The reflected sound heard by the driver has a frequency 2f.  If v be the velocity of sound, then the velocity of the car, in the same velocity units, will be

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

The transverse wave represented by the equation