Waves Test - 21...

A water wave in a shallow tank passes through a gap in a barrier. What happens to the speed and what happens to the wavelength of the wave as it passes through the gap?

Wavelength of light of frequency $$100\ Hz$$

In how many parts radio wave frequency is divided 

A source of sound of frequency 600 Hz is placed inside water. The speed in water is 1500 m/s and in air it is 300 m/s. The frequency of sound recorded by an observer standing in air is

The principle of  superposition of waves can not be used to explain wave phenomena like

Transverse waves are produced in a long string by attaching its free end to a vibrating tuning fork. Figure shows the shape of a part of the string. The points in phase are

Human audible frequency range is 20Hz to 20KHz.  If velocity of sound in air is 340m/s, the minimum wavelength of audible sound wave is

Two light waves are represented by $$y_{1} =3\sin\omega t$$ and $$y_{2}=4\sin( \omega t+\dfrac{\pi }{3} )$$. The resultant amplitude due to interference will be

During propagation of longitudinal plane wave in a medium, two particles separated by a distance equivalent to one wavelength at an instant will be/have

The frequency of vibration of a rod is $$200Hz$$. If the velocity of sound in air is $$340m/s$$, the wave length of the sound produced is