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Refraction of Light through a Prism

When a ray of...

Question

When a ray of light is incident at an angle of $35$ , on an equilateral prism, then it passes symmetrically. What is the deviation caused by the prism of the ray?

A

30

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B

20

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C

10

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D

40

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Solution

The correct option is C $10$
Angle of deviation = d = i + e - A
$\Rightarrow d = 35^{o} + 35^{0} - 60^{0} = 10^{o}$
i=e because the ray passes symmetrically

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