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(a) An object of height 2.5 cm is placed...

(a) An object of height 2.5 cm is placed perpendicularly on the principal axis of a concave mirror of focal length f at a distance of `(3)/(4)f`. What will be the nature of the image of the object and its height ?
(b) A person uses spectacles of power +2D. What type of defect of vision is it ?

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MODERN PUBLICATION-RAY OPTICS AND OPTICAL INSTRUMENTS-Revision Exercises (Numerical Problems)
  1. (a) An object of height 2.5 cm is placed perpendicularly on the princi...

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  2. A 6 m tall tree is at a distance of 18 m from a pin hole camera. Where...

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  3. A candle is placed at 4 cm distance from a concave mirror. Radius of c...

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  4. Find the areal magnification of a square object which is placed at a d...

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  5. An object is placed in front of a concave mirror of radius of curvatur...

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  6. The velocity of light in glass is 2 xx 10^(8) m//s and in air is 3 xx ...

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  7. The refractive index of glass is 1.5 and that of water is 1.3. If the ...

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  8. Velocity of light in glass is 2 xx 10^(8) m//s and that in air is 3 xx...

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  9. A small bulb (assumed to be a point source) is placed at the bottom of...

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  10. A convex lens of focal length 20 cm and a convex mirror of focal lengt...

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  11. A convex lens of focal length 25 cm is placed co-axially in contact wi...

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  12. A screen is placed 90 cm from an object. The image of the object on th...

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  13. A convex lens of focal length 20 cm and a concave lens of focal length...

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  14. A convex lens of focal length 0.24 m and of refractive index 1.5 is co...

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  15. Find the radius of curvature of the convex surface of a plano-convex l...

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  16. A lens forms real image of an object 20 cm away from lens. A second le...

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  17. A beam of light converges to a point P. A lens is placed in the path o...

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  18. A concave lens is kept in contact with convex lens of focal length 20 ...

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  19. A convex lens of refractive index 1.5 has a focal length of 18 cm in a...

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  20. A convex lens of power +5 D is placed in contact with a concave lens o...

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