Ray Optics and Optical Instruments

Related Questions

• A short sighted person can see distinctly only those objects which lie between 10 cm and 100 cm from him. The power of the spectacle lens required to see a distant object is

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• In a terrestrial telescope, the focal length of objective is 90 cm, of inverting lens is $5\,cm$and of eye lens is $6\,cm.$If the final image is at 30 cm, then the magnification will be

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• If the refractive index of a material of equilateral prism is $\sqrt{3}$, then angle of minimum deviation of the prism is

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• A converging lens is used to form an image on a screen. When upper half of the lens is covered by an opaque screen

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• Material A has critical angle ${{i}_{A}},$ and material B has critical angle ${{i}_{B}}({{i}_{B}}>{{i}_{A}}).$ Then which of the following is true (i) Light can be totally internally reflected when it passes from B to A (ii) Light can be totally internally reflected when it passes from A to B (iii) Critical angle for total internal reflection is ${{i}_{B}}-{{i}_{A}}$ (iv) Critical angle between A and B is ${{\sin }^{-1}}\left( \frac{\sin {{i}_{A}}}{\sin {{i}_{B}}} \right)$

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