Ray Optics and Optical Instruments

Related Questions

• If the angle of prism is ${{60}^{o}}$ and the angle of minimum deviation is ${{40}^{o}}$, the angle of refraction will be

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• In the visible region the dispersive powers and the mean angular deviations for crown and flint glass prisms are $\omega \omega ‘$and $d, d’$ respectively. The condition for getting deviation without dispersion when the two prisms are combined is

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• A person cannot see distinctly at the distance less than one metre. Calculate the power of the lens that he should use to read a book at a distance of 25 cm

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• A thick plane mirror shows a number of images of the filament of an electric bulb. Of these, the brightest image is the

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• The focal lengths of the lenses of an astronomical telescope are 50 cm and 5 cm. The length of the telescope when the image is formed at the least distance of distinct vision is

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