Ray Optics and Optical Instruments

Related Questions

• Two lenses having ${{f}_{1}}:{{f}_{2}}=2:3$ has combination to make no dispersion. Find the ratio of dispersive power of glasses used

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• A man can see clearly up to 3 metres. Prescribe a lens for his spectacles so that he can see clearly up to 12 metres

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• A person is suffering from the defect astigmatism. Its main reason is

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• A transparent cube of 15 cm edge contains a small air bubble. Its apparent depth when viewed through one face is 6 cm and when viewed through the opposite face is 4 cm. Then the refractive index of the material of the cube is

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• 'Mirage' is a phenomenon due to

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