Processing math: 100%


1)

A parallel beam of light of intensity I0 is incident on a coated glass plate. If 25% of the incident light is reflected from the upper surface and 50% of light is reflected from the lower surface of the glass  plate, the ratio of maximum to minimum  intensity  in the interference region of the reflected light is 


A) (12+381238)2

B) (14+381238)2

C) 58

D) 85

Answer:

Option A

Explanation:

 According to question , we can draw the following  diagram

1182021478_m10.PNG

  I1=I04I2=38I0

 We know that,

 ImaxImin= (I1+I2)2(I1I2)2=(12+381238)2