Ray Optics and Optical Instruments

Related Questions

• If the focal length of a double convex lens for red light is ${{f}_{R}},$ its focal length for the violet light is

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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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• A convex mirror of focal length $f$ forms an image which is $\frac{1}{n}$ times the object. The distance of the object from the mirror is

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• A parallel beam of monochromatic light is incident at one surface of a equilateral prism. Angle of incidence is 55° and angle of emergence is 46°. The angle of minimum deviation will be

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• All of the following statements are correct except

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