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A ray of light originates from inside a ...

A ray of light originates from inside a glass slab and is incident on its inner surface at an angle `theta` as shown,

In this experiment the location x of the spot where the ray hits the screen is recorded. Which of the following correctly shows the plot of variation of x with the angle `theta`?

A

A

B

B

C

C

D

D

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The correct Answer is:
A
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