Ray Optics and Optical Instruments

Related Questions

• In a laboratory four convex lenses ${{L}_{1}},\,{{L}_{2}},\,{{L}_{3}}$ and ${{L}_{4}}$ of focal lengths 2, 4, 6 and 8 cm respectively are available. Two of these lenses form a telescope of length 10 cm and magnifying power 4. The objective and eye lenses are

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• The angular resolution of a 10 cm diameter telescope at a wavelength of 5000 Å is of the order

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• A combination of two thin lenses of the same material with focal lengths ${{f}_{1}}$ and ${{f}_{2}}$, arranged on a common axis minimizes chromatic aberration, if the distance between them is

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• Ray optics fails when

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• The figures represent three cases of a ray passing through a prism of angle A. The case corresponding to minimum deviation is

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