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Q.

A  wave front is  represented  by  the  plane y = 3–x. The propagation of wave takes place at

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a

no sufficient data

b

45° with  x-direction

c

60° with x-direction   

d

135° with x-direction

answer is A.

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Detailed Solution

Question Image

Since direction of propagation of wave is perpendicular to wave front, the wave must be perpendicular to the line  x+y=3.

As shown 

\therefore \alpha =45{^o}
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