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Can anyone give me a detailed solution for this prmb?

Can anyone give me a detailed solution for this prmb?

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Grade:12

1 Answers

Sanju
106 Points
6 years ago
Visibility, V = Imax – Imin  / Imax + Imin = [ 2 (I1 * I2)½  / (I1 + I2) ] 
Multiplying both numerator and denominator by 1 / I2 ,
So, V =  [ 2 (I1 / I2)½  / ((I1 / I2) + 1) ]  = 2 (β)½ / β+1
Ans: Option A

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