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Q.

Waves of same amplitude and same frequency from two coherent sources overlap at a point. The ratio of the resultant intensity when they arrive in phase to that when they arrive with 90º phase difference is

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a

2 : 1

b

1 : 1

c

2:1

d

4 : 1

answer is C.

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Detailed Solution

I1=4I0;   I2=4I0cos2902=2I0;   I1I2=2:1

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