Question

A pulse is allowed to get reflected by a wall. Then-
a. ∠r = ∠i
b. compression becomes rare fraction
c. only (a)
d. both (a) and (b)
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Answer 1

Answer:

option a is the answer

When a pulse is reflected from the wall, then the phase changes due to reflection from the rigid boundary. When a pulse is reflected from the wall, then the phase changes due to reflection from the rare boundary. And the total phase angle also changes due to two reflections.

Explanation:

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Answer 2

A pulse is allowed to get reflected by a wall. Then-

ANS: d. both (a) and (b)