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A hollow sphere of glass of inner and ou...

A hollow sphere of glass of inner and outer radii R and 2R respectively has a small mark on its inner surface. This mark is observed from a point outside the sphere such that the centre of the sphere lies in between. Prove that the mark will appear nearer than it really it, by a distance `(mu-1)(R)//(3mu-1)`

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PHYSICS GALAXY - ASHISH ARORA-GEOMETRICAL OPTICS-Unsolved Numerical Problems
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  2. A glass sphere with centre O is shown in the figure, AOB and COD are t...

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  3. A hollow sphere of glass of inner and outer radii R and 2R respectivel...

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  4. Two thin similar watch glass pieces are joined together,front to fron...

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  5. Two convex lenses of focal lengths f(1) and f(2) are placed coaxially,...

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  6. A prism of angle 60^(@) deviates a ray of light through 31^(@) for two...

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  7. Two large plane mirrors OM and ON are arranged at 150° as shown in the...

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  8. A concave lens of focal length 20 cm is placed 15 cm in front of a con...

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  9. A double convex lens is placed on a horizontal plane mirror. A pin hel...

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

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  11. Image of an object approaching a convex mirror of radius of curvature ...

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  12. A ray is incident on a glass sphere as shown.The opposite surface of t...

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  13. Light is incident normally on the short face of a 30^@-60^@-90^@ prism...

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  14. A convex lens of crown glass is perfectly cemented to a plano-concave ...

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  15. A converging system of convex lenses free from chromatic aberration an...

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  16. For a ray of light refracted through a prism of angle 60^(@), the angl...

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  17. ln a biprism experiment, 21 fringes are seen distinctly on a screen at...

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  18. In a direct vision spectroscope there are two flint glass prisms each ...

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  19. An achromatic doublet of focal length 50 cm is used as an objective of...

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  20. A ray of light incident normally on one of the faces of a right-angle ...

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