Ray Optics and Optical Instruments

Related Questions

• A lens is placed between a source of light and a wall. It forms images of area ${{A}_{1}}$ and ${{A}_{2}}$ on the wall for its two different positions. The area of the source or light is

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• A converging lens is used to form an image on a screen. When upper half of the lens is covered by an opaque screen

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• A white screen illuminated by green and red light appears to be

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• In a thin prism of glass (refractive index 1.5), which of the following relations between the angle of minimum deviations ${{\delta }_{m}}$ and angle of refraction $r$ will be correct

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• Two thin lenses, one of focal length + 60 cm and the other of focal length – 20 cm are put in contact. The combined focal length is

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