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A ray of light is incident at small angl...

A ray of light is incident at small angle I on the surface of prism of small angle A and emerges normally from the oppsite surface. If the refractive index of the material of the prism is mu, the angle of incidence is nearly equal to

A

`A/mu`

B

`(A)/(2mu)`

C

`muA`

D

`(muA)/(2)`

Text Solution

Verified by Experts

The correct Answer is:
C

`1xxsini=musinA`
When A is small, `sinA=A`
`sini=muA`
`i=muA`
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CP SINGH-REFRACTION OF LIGHT BY PLANE SURFACES-Exercises
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  7. P is small angled prism of angle 3^(@) made of a material of refractiv...

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  8. Light is incident normally on face AB of a prism as shown in Figure. A...

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  9. A beam of white light is incident on a hollow prism of glass. Then

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  10. For a small angled prism, angle of prism A of minimum deviation(delta)...

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  11. The graph between angle of deviation (delta) and angle of incidence (i...

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  12. A narrow beam of white light enters slab having parallel faces.

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  13. A medium is said to be dispersive if

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  14. Dispersion can take place for

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  15. The angular dispersion produced by a prism

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  16. Dispersive power depends upon

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  17. If D is the deviation of a normally falling light beam on a thin prism...

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  18. If a glass prism is dipped in water, its dispersive power

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  19. By properly combining two prisms made of different materials, it is po...

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  20. When white light passes through the achromatic combination of prisms, ...

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