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Minimum Deviation

A ray of ligh...

Question

A ray of light incident at an angle $48^{o}$ on a prism refracting angle $60^{o}$ suffers minimum deviation. Calculate the angle of minimum deviation.

A

72^{o}

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B

18^{o}

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C

36^{o}

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D

54^{o}

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Solution

The correct option is C $36^{o}$
$δ_{m i n} = 2 i - A =$ $2 \times 48 - 60$ $= 36^{o}$

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