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A concave lens of focal length 15 cm for...

A concave lens of focal length 15 cm forms an image 10 cm from the lens. How far is the object placed from the lens? Draw the ray-diagram.

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`u=-30 cm, The object is at 30 cm from the concave lens on its left side
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LAKHMIR SINGH & MANJIT KAUR-REFRACTION OF LIGHT-Exercise
  1. A 50 cm tall object is at a very large distance from a diverging lens....

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  2. An object is placed at a distance of 4 cm from a concave lens of focal...

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  3. A concave lens of focal length 15 cm forms an image 10 cm from the len...

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  4. An object 60 cm from a lens gives a virtual image at distance of 20 cm...

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  5. A concave lens of 20 cm focal length forms an image 15 cm from the len...

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  6. A concave lens has focal length of 15 cm. At what distance should an o...

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  7. A concave lens has focal length of 20 cm. At what distance from the le...

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  8. A concave lens has focal length of 20 cm. At what distance from the le...

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  9. An object is placed 15 cm from (alpha) a converging mirror, and (b) a ...

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  10. A 2.0 cm tall object is placed 40 cm from a diverging lens of focal le...

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  11. a) Find the position and size of the virtual image formed when an obje...

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  12. a) A small object is placed 150 mm away from a diverging lens of focal...

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  13. A concave lens produces an image 20 cm from the lens of an object plac...

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  14. Only one of the following applies to a concave lens. This is:

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  15. The magnification produced by a spherical lens and a spherical mirror ...

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  16. An object is 2m from a lens which forms an erect image one-fourth (exa...

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  17. An image formed on a screen is three times the size of the object. The...

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  18. The lens A has a focal length of 25 cm whereas another lens B has a fo...

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  19. Which causes more bending (or more refraction) of light rays passing t...

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  20. Name the physical quantity whose limit unit is dioptre.

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