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A biconvex thin lens is prepared from gl...

A biconvex thin lens is prepared from glass of refractive index `mu_(2)=(3)/(2)`. The two conducting surfaces have equal radii of 20 cm each. One of the the surface is silvered from outside to make it reflecting. It is placed in a medium of refractive index `mu_(1)=(5)/(3)`. It acts as a

A

20 cm

B

10 cm

C

40 cm

D

30 cm

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The correct Answer is:
A
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AAKASH SERIES-GEOMETRICAL OPTICS-ADDITIONAL PRACTICE EXERCISE -I (LEVEL-I(MAIN) STRAIGHT OBJECTIVE TYPE QUESTIONS)
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  5. A ray of light travels from an optically denser to rarer medium. The c...

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  6. A point source of light is placed at the bottom of a water lake. If th...

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  8. A biconvex thin lens is prepared from glass of refractive index mu(2)=...

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  11. The focal lengths of a lens are in the ratio 8:3 when it is immersed i...

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  14. A convex lens is in contact with a concave lens. The magnitude of the...

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  15. A double convex lens is made of glass which has refractive inded 1.55 ...

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  16. The refractive index of a lens material is 1.5 and focal length f. Du...

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  17. A plano-convex lens of refractive index 1.5 and radius of curvature 30...

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  18. A ray of light is incident at 50^(@) on the middle of one of two mirr...

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  19. A 2.0 cm high object is placed on the principal axis of a concave mirr...

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