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When a light ray from a rarer medium is refracted into a denser medium, its
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Important Questions on Ray Optics and Optical Instruments
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A narrow, paraxial beam of light is converging towards a point I on a screen. A plane parallel plate of glass of thickness and refractive index is introduced in the path of the beam. The convergence point is shifted by
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The length of a vertical pole at the surface of a lake of water is Then to an under-water fish just below the water surface the tip of the pole appears to be
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A ray of light strikes a glass plate at an angle of . If the reflected and refracted rays are perpendicular to each other, the index of refraction of glass is,
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A microscope is focused on a coin lying at the bottom of a beaker. The microscope is now raised up by To what depth should the water be poured into the beaker so that coin is again in focus? (Refractive index of water is .
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Two transparent media A and B are separated by a plane boundary. The speed of light in medium A is and in medium B is . The critical angle for which a ray of light going from A to B is totally internally reflected is
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Which of the following is possible application of fibre optics ?
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An object is placed at a distance of from a convex lens. The image will be
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The least distance between a point object and its real image formed by a convex lens of focal length is
