The intensity of a progressing plane wave in loss-free medium is

statement I: The intensity of a plane progressive wave does not change with change in distance from the source. Statement II: The wavefronts associated with a plane progressive wave are planar.

statement I: The intensity of a plane progressive wave does not change with change in distance from the source. Statement II: The wavefronts associated with a plane progressive wave are planar.

Progressive Waves

The equation of a progressive wave in a medium is y= a sin ( 100 pi t +(pi)/( 10) x) , where x is in metre and t is in second . The velocity of wave in the medium is

The ratio between the amplitudes of electric and magnetic fields at any point on a progressive electromagnetic wave in free space is equal to

The intensity of sound waves in a medium is directly proportional to ________ .

When interference is produced by two progressive waves of equal frequencies, then the maximum intensity of the resulting sound are N times the intensity of each of the component waves. The value of N is

When interference is produced by two progressive waves of equal frequencies, then the maximum intensity of the resulting sound are N times the intensity of each of the component waves. The value of N is

The intensity of sound wave while passing through an elastic medium falls down by 10% as it covers one metre distance through the medium. If the initial intensity of the sound wave was 100 decibels, its value after it has passed through 3 metre thickness of the medium will be