Ray Optics and Optical Instruments

Related Questions

• A person wears glasses of power – 2.0 D. The defect of the eye and the far point of the person without the glasses will be

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• A convex lens forms a real image of an object for its two different positions on a screen. If height of the image in both the cases be 8 cm and 2 cm, then height of the object is

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• The focal lengths of the lenses of an astronomical telescope are 50 cm and 5 cm. The length of the telescope when the image is formed at the least distance of distinct vision is

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• A convex lens of focal length $0.5 m$ and concave lens of focal length $1 m$ are combined. The power of the resulting lens will be

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• The velocity of light in a medium is half its velocity in air. If ray of light emerges from such a medium into air, the angle of incidence, at which it will be totally internally reflected, is

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