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Aluminous object and a screen are placed...

Aluminous object and a screen are placed on an optical bench and a converging lens is placed between them to throw a sharp image of the object on the screen, the linear magnification of the image is found to be 2.5. The lens is now moved 30 cm nearer the screen and a sharp image is again formed. Calculate the focal length of the lens.

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SL ARORA-RAY OPTICS-TYPE H
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  10. A convex lens is used to throw on a screen 10 m from the lens, a magni...

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  11. Use the thin lens formula to show that an object placed within the foc...

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  12. Use the thin lens formula to deduce algebraically that a concave lens ...

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

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  14. Aluminous object and a screen are placed on an optical bench and a con...

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  15. An object and a screen are placed 80 cm apart. There are two positions...

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  16. In Fig. a convex, lens L is placed at a distance of 36 cm from a scree...

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