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The refracting angle of a prism is A and...

The refracting angle of a prism is A and refractive index of the material of prism is `cot(A//2)` . The angle of minimum deviation will be

A

`180^@-3A`

B

`180^@+2A`

C

`90^@-A`

D

`180^@-2A`

Text Solution

Verified by Experts

The correct Answer is:
B
`mu=(sin(A+delta_m)/2)/sin(A//2),`
Given, `mu=cot(A/2)`
Solving, we get `sin=180^@-2A`
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DC PANDEY-REFRACTION OF LIGHT-Level 1 Objective
  1. A prism can have a maximum refracting angle of (thetaC=critical angle ...

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  2. A ray is ihncident at an angle of incidence ii on one surface of a pri...

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  3. The refracting angle of a prism is A and refractive index of the mater...

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  4. A prism of refractive index sqrt2 has refractive angle 60^@. In the or...

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  5. The focal length of a combination of two lenses is doubled if the sep...

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  6. A convexo-concave convergent lens is made of glass of refractive index...

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  7. An optical system consists of a thin convex lens of focal length 30 cm...

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  8. In the figure shown, the angle made by the light ray with the normal i...

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  9. For refraction through a small angled prism, the angle of minimum devi...

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  10. A ray of light passes from vaccum into a medium of refractive index n....

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  11. A thin convex lens of focal length 30 cm is placed in front of a plane...

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  12. One side of a glass slab is silvered as shown in the figure. A ray of ...

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  13. A prism has refractive index sqrt((3)/(2)) and refractive angle 90^@. ...

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  14. In figure, an air lens of radius of curvature of each surface equal to...

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  15. A point object is placed at a distance of 12 cm from a convex lens of ...

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  16. An object, a convex lens of focal length 20 cm and a plane mirror are ...

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  17. The prism shown in figure has a refractive index of 1.60 and the angle...

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  18. A prism having refractive index sqrt2 and refractive angle 30^@ has on...

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  19. The image for the converging beam after refraction through the curved ...

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  20. A concavo-convex lens is made of glass of refractive index 1.5. The ra...

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