Ray Optics and Optical Instruments

Related Questions

• The focal lengths for violet, green and red light rays are ${{f}_{V}},{{f}_{G}}$and ${{f}_{R}}$ respectively. Which of the following is the true relationship

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• Finger prints are observed by the use of

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• The number of lenses in a terrestrial telescope is

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• The time taken by sunlight to cross a 5 mm thick glass plate $(\mu =3/2$) is

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• The power of an achromatic convergent lens of two lenses is $+ 2D$. The power of convex lens is $+ 5D$. The ratio of dispersive power of convex and concave lens will be

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