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Q.

The equation of a plane progressive wave is Y=3sinπt−x10 when it is reflected at rigid support, its amplitude becomes 1/3rd of its previous value. The equation of the reflected wave is :

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a

Yr=2sinπt+x10

b

Yr=sinπt+x10

c

Yr=−sinπt+x10

d

Yr=sinπ−t+x10

answer is C.

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Detailed Solution

Phase change of π radians will take place & direction of propagation is reversed.
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