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A small object is so placed in front of ...

A small object is so placed in front of a convex lens of 5cm focal length that a virtual image is formed at a distance of 25 cm. Find the magnification.

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LAKHMIR SINGH & MANJIT KAUR-REFRACTION OF LIGHT-Exercise
  1. State and explain the New Cartesian Sign Convention for spherical lens...

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  2. An object 4 cm high is placed at a distance of 10 cm from a convex len...

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  3. A small object is so placed in front of a convex lens of 5cm focal len...

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  4. Find the position and nature of the image of an object 5 cm high and 1...

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  5. Calculate the focal length of a convex lens which produces a virtual i...

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  6. An object is placed at a distance of 100 cm from a converging lens of ...

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  7. A convex lens produces an inverted image magnified three times of an o...

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  8. A converging lens of focal length 5 cm is placed at a distance of 20 c...

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  9. An object 5 cm in length is held 25 cm away from a converging lens of ...

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  10. At what distance should an object be placed from a convex lens of foca...

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  11. An object 2 cm tall is placed on the axis of a convex lens of focal le...

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  12. The filament of a lamp is 80 cm from a screen and a converging lens fo...

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  13. An erect image 2.0 cm high is formed 12 cm from a lens, the object bei...

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  14. A convex lens of focal length 0.10 cm is used to form a magnified imag...

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  15. A convex lens of focal length 6 cm is held 4cm from a newspaper which...

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  16. Determine how far an object must be placed in front of a converging le...

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  17. A lens of focal length 20 cm is used to produce a ten times magnified ...

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  18. An object placed 4 cm in front of a converging lens produces a real im...

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  19. a) An object 2 cm tall stands on the principal axis of a converging le...

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  20. a) An object 3 cm high is placed 24 cm away from a convex lens of foca...

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