Spherical waves are emitted from a `1.0 W` source in an isotropic non-absorbing medium. What is the wave intesity `1.0 m` from the source?

Spherical wave are emitted from 2 watt point source in an isotropic non-absorbing medium. Calculate the wave intensity 1m from the source?

A source of sound operates at 2.0 kHz, 20 W emitting sound uniformly in all direction. The speed of sound in air is 340 m s^(-1) at a distance of air is 1.2kgm ^(-3) What is the intensity at a distance of 6.0 m from the source ?

A point source of sound is placed in a non-absorbing medium two points A and B are at the distance of 1 m and 2 m, respectively, from the source. The ratio of amplitudes of waves at A to B is

A point source of sound is placed in a non-absorbing medium two points A and B are at the distance of 1 m and 2 m, respectively, from the source. The ratio of amplitudes of waves at A to B is

A point source of sound is placed in a non-absorbing medium two points A and B are at the distance of 1 m and 2 m, respectively, from the source. The ratio of amplitudes of waves at A to B is

The intensity of a wave emitted from a small source at a distance 10 m is 20 xx 10^(-3)"Wm"^(-2). What is the intensity at a distance 100 m ?

Assertion : Wavefronts obtained from light emitted by a point source in an isotropic medium are always spherical. Reason : Speed of light in isotropic medium is constant.