Ray Optics and Optical Instruments

Related Questions

• In Gallilean telescope, if the powers of an objective and eye lens are respectively +1.25 D and – 20 D, then for relaxed vision, the length and magnification will be

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• An object is placed at $20cm$ from a convex mirror of focal length $10\,cm.$ The image formed by the mirror is

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• A convex lens has a focal length $f$. It is cut into two parts along the dotted line as shown in the figure. The focal length of each part will be

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• A double convex lens of glass of $\mu = 1.5$ has radius of curvature of each of its surface is 0.2 m. The power of the lens is

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• A man is suffering from colour blindness for green colour. To remove this defect, he should use goggles of

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