Question

When longitudinal wave propagates through a medium, then the physical quantities propagating in the direction of wave are

• A. Energy
• B. Energy, momentum and mass
• C. Energy and mass
• D. Energy and momentum

Answer 1

The correct option is A Energy

When a disturbance is produced in a medium , it is transported by oscillating particles of the medium , the disturbance is a kind of energy and carried by oscillating particles by passing it to the next particle , in this way a longitudinal wave propagates, therefore energy propagates in a longitudinal wave .

As there is no net movement of the medium particles in the propagation of wave , they just vibrate about the centers of rarefaction and compressions , therefore momentum is not transferred in a longitudinal wave . Thus only energy is propagating in the direction of wave.