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A light ray is travelling from air to gl...

A light ray is travelling from air to glass. True reflected and refracted rays are perpendicular to each other. If the angle of incidence in air is I the refractive index of glass is

A

sini

B

cosi

C

tani

D

coti

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The correct Answer is:
C
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AAKASH INSTITUTE ENGLISH-RAY OPTICS AND OPTICAL INSTRUMENTS-ASSIGNMENT (SECTION - B)
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  12. A plane glass is kept over a coloured word 'VIBGYOR', where colour of ...

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  16. When a telescope is in normal adjusment, the distance of the objective...

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  17. A converging lens of focal length 30 cm is placed in contact with anot...

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  18. In the diagram the ray passing through prism is parallel to the base. ...

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  19. In a displacement method the distance between the object and the scree...

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