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If radii of curvature of both convex surfaces is then focal length of the lens for an object placed in air in the given arrangement is
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Important Questions on Ray Optics and Optical Instruments
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Ray diagram for two lenses kept at some distance given in the diagram, which of the following option is correct focal length, distance between lenses)
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In displacement method, convex lens forms a real image of an object for its two different positions. If heights of the images in two cases be and then the height of the object is
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If a lens is moved towards the object from a distance of to the magnification of the image remains the same (numarically). The focal length of the lens is
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A convex lens of power is in contact with a concave lens of focal length The power of combination is
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A converging lens of focal length is placed in contact with another converging lens of unknown focal length, then possible value for focal length of combination is
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In displacement method we use a lens of focal length and distance between object and screen is Possible value for focal length is
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A double convex lens has two surfaces of equal radii and refractive index its focal length is equal to
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The distance between a real object and its real image is formed by converging lens, focal length of lens is
