Two light waves of intensities I 1 and I 2 having same frequency pass through the same medium at a time in the same direction and interfere. The sum of the minimum and maximum intensities is

Question

Two light waves of intensities I 1 and I 2 having same frequency pass through the same medium at a time in the same direction and interfere. The sum of the minimum and maximum intensities is, I 1 + I 2, 2 I 1 + I 2, I 1 + I 2, I 1 - I 2

MARKS App · Accepted Answer

I max = ( a 1 + a 2 ) 2 I min = ( a 1 − a 2 ) 2 I max + I min = a 1 2 + a 2 2 + a 1 2 + a 2 2 = 2 ( a 1 2 + a 2 2 ) = 2 ( I 1 + I 2 )

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