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A beam of light is incident on a glass s...

A beam of light is incident on a glass slab `(mu=1.54)` in a direction as shown in the figure. The reflected light is analysed by a polaroid prims. On rotating the polaroid `(tan57^(@)=1.54)`

A

a. the intensity remains unchanged

B

b. the intensity is reduced to zero and remains at zero

C

c. the intensity gradually reduces to zero and then again increases

D

d. the intensity increases continuously

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The correct Answer is:
C
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