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Lenses of powers and are combined form a compound lens. An object is placed at a distance of from this lens. Calculate the position of its image.
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Important Questions on Ray Optics
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A convex lens of the focal length of is in contact with a concave lens of focal length . The power of the combination is
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An object is put at a distance of from the first focus of a converted lens of focal length . If a real image is formed its distance from the lens will be:-
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An equiconvex lens has a power of . If it is made of glass of refractive index . Then the radius of curvature of each surface will be-
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An object placed at a distance of 9 cm from first principal focus of convex lens, produces a real image at a distance of 25 cm from its second principal focus. Then focal length of lens is
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A convex lens of glass has a focal length of when placed in air. What is the focal length of lens when it is immersed in water
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Two thin convex lenses of focal length and are separated by a distance of . The focal length of the combination is :-
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A convex lens of power is immersed in water. How will its power change?
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A convex lens is made up of three different materials as shown in the figure. For a point object placed on its axis, the number of images formed is
