An object of height 2 cm is kept at 30 c...

An object of height 2 cm is kept at 30 cm from a convex lens . Its real image is formed at 60 cm from the lens .Find the focal length and power of the lens.

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Solve the following examples/ numerical problems: An object is kept at 60 cm in front of a convex lens. Its real image is formed at 20 cm from the lens . Find the focal length of the lens.

An object is kept at 20 cm in front of a convex lens its real image is formed at 60 cm from the lens. Find (i) the focal length of the lens (ii) the height of the image if the height of the object is 6 cm.

An object is kept at 10 cm in front of a convex lens . Its image is formed on the screen at 15 cm from the lens. Calculate (i) the focal length of the lens (ii) the magnification produced by the lens.

Solve the following examples/ numerical problems: When a pin of height 3 cm is fixed at 10 cm from a convex lens , the height of the virtual image formed is 12 cm . Find the focal length of the lens.

An object is kept at a distance of 60 cm in front of a convex lens. Its real and inverted image is fonned at a distance of 20 cm from the lens. Find the focal length of the lens.

A convex lens forms a real and inverted image of a pencil at a distance of 40 cm from the lens. The image formed is of the same size as the object Find the focal length and power of the lens. At what distance is the : object placed from the lens?

The real image of an object placed at 60 cm from a concave Mirror is formed at 20 cm. from the mirror. Find the focal length of the mirror.

An object is placed at a distance of f//2 from a convex lens. The image will be

Answer the following questions : When an object of height 2 cm is placed in front of a convex lens, the height of the image is found to be 3cm . State the nature and position of the image giving reason .

NAVNEET PUBLICATION-LENSES-EXERCISE

Solve the following examples/ numerical problems: Calculate the foca...
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Three lenses having power 2, 2.5 and 1.7 D are kept touching in a row....
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Solve the following examples/ numerical problems: Two convex lenses ...
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Solve the following examples/ numerical problems: Two convex lenses ...
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Solve the following examples/ numerical problems: < br > If a convex l...
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Find the focal length of a convex lens which produces a real image at ...
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Find the focal length of a convex lens which produces a virtual image ...
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A real image is obtained at 30 cm from a convex lens of focal length 7...
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An object is kept at 20 cm in front of a convex lens its real image is...
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An object is kept at 10 cm in front of a convex lens . Its image is f...
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An object is kept at 60 cm in front of a convex lens of focal length 1...
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An object of height 2 cm is kept at 30 cm from a convex lens . Its rea...
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If the power of a lens is 4 dioptres , find its focal length.
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Find the power of a convex lens of focal length 40 cm.
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Find the power of a convex lens of focal length 12.5 cm.
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If for a lens , f= -20 cm, what is the power of the lens ?
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An object of height 4 cm is kept in front of a concave lens of focal l...
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If two convex lenses of focal lengths 10 cm and 5 cm are kept in conta...
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If a convex lens of focal length 20 cm and a concave lens of focal len...
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If a concave lens of focal length 12 cm and a convex lens of focal len...
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