A lens of power +2 dioptres is placed in...

A lens of power `+2` dioptres is placed in contact with a lens of power `-1` dioptre. The combination will behave like

a convergent lens of focal length 50 cm

a divergent lens of focal length 100 cm

a convergent lens of focal length 100 cm

a convergent lens of focal length 200 cm

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MOTION-RAY OPTICS-Exercise-1

A convex lens of focal length f will form a magnified real image of an...
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IMAGE FORMATION FROM CONCAVE LENS
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A lens of power +2 dioptres is placed in contact with a lens of powe...
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When two thin lenses are kept in contanct, the focal length of the com...
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A thin convex lens of focal length 10 cm and a thin concave lens of f...
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A convex lens of focal length A and a concave lens of focal length B a...
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When a thin convex lens is put in contact with a thin concave lens of ...
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If I(1) and I(2) be the size of the images respectively for the two po...
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A convex lens forms a real image on a screen placed at a distance 60 c...
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A plano-convex lens when silvered on the plane side behaves like a con...
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The plane surface of a plano-convex lens of focal length f is silvered...
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A concave lens of focal length 25 cm and a convex lens of focal length...
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Two lenses of power +2.50D and -3.75D are combined to form a compound ...
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Lenses of powers 3D and -5D are combined to from a compound lens. An o...
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An object placed at a distance of a 9cm from the first principal focus...
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A convex lens of Focal length of 40cm is in contact with a concave len...
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An object is put at a distance of 5cm from the first focus of a convex...
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Focal length of convex lens is f. If this lens is cut along parallel t...
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In the figure shown, there are two convex lenses L(1) and L(2) having ...
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What should be the value of distance d so that final image is formed o...
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