A convex lens causes a ray of light to c...

A convex lens causes a ray of light to converge, for this reason it may be used to correct

Near sightedness

Far sightedness

Astigmatism

Both (2) & (3)

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A convex lens and a plane mirror are kept at a distance of 10 cm as shown in the diagram alongside. Parallel rays incident on the convex lens after reflection from the mirror from an image at the optical cetre. Complete the ray diagram and find out the focal length of the lens.

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A convex lens is used to obtain a magnified image of an object on a screen . The object is at a distance 10 m from the lens . If the magnification is 19. the focal length of the lens is

AAKASH INSTITUTE ENGLISH-Mock Test 36-Example

Two thin lenses of focal lengths 20 cm and 25 cm are placed in a conta...
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In case of myopia
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A convex lens causes a ray of light to converge, for this reason it ma...
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A person cannot see objects clearly beyond 125 cm. The power of the le...
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In a compound microscope, the intermediate image is
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If fo and fe are the focal lengths of the objective lens and eye-piece...
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In a laboratory five convex tenses L1, L2, L3, L4 and L5 of focal leng...
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The minimum magnification produced by simple microscope of focal lengt...
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The difference between maximum magnification and minimum magnification...
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A person cannot see objects clearly that are closer that 1 m and farth...
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Magnifying power of an astronomical telescope is M.P. If the focal len...
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A far sighted person cannot see object clearly al a distance less than...
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Select the correct option
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In order to increase the magnifying power of a telescope
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Identify the correct description of the below figure
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The shape of reflected wavefronts in case of reflection of plane wave ...
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For point source, the wavefront is
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The value of angle r in figure below is
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Huygen's wave theory explain the phenomena of
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Huygen's principle allows us to determine,
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