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Questions  

Considering near normal incidence of ray, the equivalent refractive index of combination of two slabs shown in figure is

 

a
1.8
b
1.43
c
1.92
d
1.67

detailed solution

Correct option is B

The equivalent refractive index of combination of slabs for near normal incidence isμe=∑ti∑tiμi =  t1+t2t1μ1+t2μ2 =  10+15104/3  +  153/2 = 1.43

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