Question

If the longitudinal wave travelling in rarer medium is incident on the boundary of denser medium, then the phase of wave changes by

(a) 2 pie rad

(b) pie rad

(C) pie/2 rad
(D) pie/4rad

Answer 1

Answer:

2 pie rad is the current answer

Answer 2

Hey Dear,

◆ Answer -

(b) π rad

● Explanation -

• Longitudinal waves consist of compression and rarefaction.
• When a longitudinal wave travelling in rarer medium reflects from boundary of denser medium, phase difference is π. Therefore, compression becomes compression and rarefaction as rarefaction.
• When a longitudinal wave travelling in denser medium reflects from boundary of rarer medium,, phase difference is 0. Therefore, compression becomes rarefaction and rarefaction as compression.

Thanks dear...