Ray Optics and Optical Instruments

Related Questions

• A fish looking up through the water sees the outside world contained in a circular horizon. If the refractive index of water is $\frac{4}{3}$ and the fish is $12 cm$ below the surface, the radius of this circle in cm is

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• The diameter of the objective of a telescope is $a$, its magnifying power is $m$ and wavelength of light is $\lambda .$The resolving power of the telescope is

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• When seen in green light, the saffron and green portions of our National Flag will appear to be

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• A far sighted man who has lost his spectacles, reads a book by looking through a small hole (3-4 mm) in a sheet of paper. The reason will be

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• A fist looking from within water sees the outside world through a circular horizon. If the fish $\sqrt{7}$cm below the surface of water, what will be the radius of the circular horizon

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