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A prism of apex angle A=60^@ has the ref...

A prism of apex angle `A=60^@` has the refractive index `mu=sqrt2.` The angle of incidence for minimum deviation is

A

`30^@`

B

`45^@`

C

`60^@`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
At minimum deviation,
`r_1=r_2=A/2=30^@`
Now using, `mu=(sini_(1))/(sinr_(1))` or `sqrt2=sini_1/sin30^@`
We get `i_1=45^@`
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DC PANDEY-REFRACTION OF LIGHT-Level 1 Objective
  1. In the figure shown sin i/sin r is equal to

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  2. In figure, the reflected ray B makes an angle 90^@ with the ray C. If ...

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  3. A prism of apex angle A=60^@ has the refractive index mu=sqrt2. The an...

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  4. A thin equi-convex lens is made of glass of refractive index 1.5 and i...

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  5. A ray of light, travelling in a medium of refractive index mu, is inci...

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  6. The given equi-convex lens is broken into four parts and rearranged as...

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  7. A thin convergent glass lens (mug=1.5) has a power of +5.0D. When this...

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  8. Two convex lenses of focal length 10 cm and 20 cm respectively placed ...

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  9. A prism can have a maximum refracting angle of (thetaC=critical angle ...

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

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

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

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

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

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

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

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

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

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

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

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