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Critical Angle

A ray of ligh...

Question

A ray of light strikes the glass slab at an angle of $50^{o}$ . Then the angle of incidence will be _____.

A

50^{o}

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B

90^{o}

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C

60^{o}

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D

40^{o}

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Solution

The correct option is D $40^{o}$
Glancing angle = $50^{0}$
Angle of incidence $= 90^{0} - 50^{0} = 40^{0}$

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