Question

ii) When a longitudinal wave is reflected from a denser medium, the phase change produced is,
T
a) Zero rad
b) ärad
c
) ärad
d) trad​

Answer 1

Answer:

zero radian

Explanation:

zero radian

Answer 2

When a longitudinal wave is reflected from a denser medium, the phase change produced is :

• Longitudinal waves undergoes compression and rarefaction because of the pressure variation.

• When compression strikes some rigid surface, it exerts force on it. But as the surface is rigid, it also exerts same force as wave and reflects compression back.

• Direction of particles traveling gets opposite.

• Hence, there is a phase difference of π radian or 180° between the incident wave and the reflected wave.

• Incident rarefaction is reflected as a rarefaction.