Ray Optics and Optical Instruments

Related Questions

• A person can not see the objects clearly placed at a distance more than 40 cm. He is advised to use a lens of power

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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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• A ray of monochromatic light suffers minimum deviation of ${{38}^{o}}$ while passing through a prism of refracting angle ${{60}^{o}}$. Refractive index of the prism material is

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• The human eye has a lens which has a

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• 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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