Ray Optics and Optical Instruments

Related Questions

• Three prisms 1, 2 and 3 have the prism angle $A = 60^o$, but their refractive indices are respectively 1.4, 1.5 and 1.6. If $\delta _1, \delta _2, \delta _3$ be their respective angles of deviation then

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• A convex lens is used to form real image of an object on a screen. It is observed that even when the positions of the object and that screen are fixed there are two positions of the lens to form real images. If the heights of the images are 4 cm and 9 cm respectively, the height of the object is

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• If there had been one eye of the man, then

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• A man suffering from myopia can read a book placed at 10 cm distance. For reading the book at a distance of 60 cm with relaxed vision, focal length of the lens required will be

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• At Kavalur in India, the astronomers using a telescope whose objective had a diameter of one meter started using a telescope of diameter 2.54 m. This resulted in

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