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For magnification equal to one, the distance of a real object from the pole of a concave mirror of focal length 10 cm should be

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Important Questions on Ray Optics and Optical Instruments

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For a real object which of the following can produce a virtual image ?
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A beam of monochromatic light of wavelength 3900 Ao in air travels into glass of refractive index 32. Its wavelength in glass will be
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A driving mirror consists of a cylindrical mirror of radius of curvature 10 cm and the length over the curved surface is 10 cm. If the eye of the driver be assumed to be at a great distance from the mirror, then field of view in radian is
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A short linear object of length l lies along the axis of a concave mirror at a distance u from it. If v is the distance of image from the mirror then size of the image is
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A ball is projected from top of the table with initial speed u at an angle of inclination θ, motion of image of ball w.r.t ball

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n^1 is the unit vector along incident ray, n^2 along normal and n^3 is the unit vector along reflected ray, then which of the following must be true ?
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Digital movie projectors work on the principle of
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When a beam of light is incident on a plane mirror, it is found that a real image is formed. The incident beam must be