Ray Optics and Optical Instruments

Related Questions

• Two convex lenses of focal lengths 0.3 m and 0.05 m are used to make a telescope. The distance kept between the two is

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• The speed of light in air is $3\times {{10}^{8}}\,\,m/s$. What will be its speed in diamond whose refractive index is 2.4

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• A thin convex lens of focal length 10 cm is placed in contact with a concave lens of same material and of same focal length. The focal length of combination will be

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• The sky would appear red instead of blue if

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• The focal lengths of the objective and eye lenses of a telescope are respectively 200 cm and 5 cm. The maximum magnifying power of the telescope will be

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