Question

How can we distinguish between longitudinal and transverse waves?

• A. By interference
• B. By reflection
• C. By polarization
• D. By doppler's effect

Answer 1

The correct option is C By polarization

In longitudinal waves, the vibrations/oscillations are along the direction of wave propagation.
In transverse waves, the vibrations/oscillations are perpendicular to the direction of wave propagation.

When transverse waves have their particles always vibrating in the same plane, the wave is said to be "plane polarised". Longitudinal waves can't be polarised because their particles vibrate in the same direction that the wave travels