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An object is 60 cm in front of a thin le...

An object is 60 cm in front of a thin lens, the image being 300 cm on the other side of the lens. Calculate the displacement of the image, when the object is moves 20 cm nearer to the lens.

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The correct Answer is:
500 cm
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SL ARORA-RAY OPTICS-Problems For Self Practice
  1. A convex lens is placed on an optical bench and is moved till it gives...

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  2. A convex lens of focal length 30 cm is placed between a screen and a s...

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  3. An object is 60 cm in front of a thin lens, the image being 300 cm on ...

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  4. A source of light and a screen are placed 90 cm apart. Where should a ...

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  5. An object is placed at a distance of 1.5 m from a screen and a convex ...

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  6. The distance between a convex lens and a plane mirror is 15 cm. The pa...

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  7. A concave lens focal length 10 cm is placed on the axis of concave mir...

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  8. A concave lens is placed in the path of convergent rays. The rays are ...

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  9. A needle 10 cm long is placed along the axis of a convex lens of focal...

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  10. When a slide is placed 15 cm behind the lens in a projector, an image ...

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  11. In the diagram shows below rays are coming from infinity and after pas...

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  12. In the following ray diagram are given the position of an object O, im...

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  13. In the following diagram are shown the position of an object O, image ...

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  14. A compound lens has been formed by joinined a convex and a concave len...

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  15. Two thin lenses of power + 3 D and - 1 D are held contact with each ot...

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  16. A what distance must an object be placed from convex lens of power 4D ...

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  17. Find the focal length and power of a convex lens, which when placed in...

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  18. The power of a thin convex lens of glass is 5 dioptre. When it is imme...

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  19. A concave lens is kept in contact with a convex lens of focal length 2...

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  20. A compound lens is made of two lenses having powers +15.5 D and -5.5D....

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