Ray Optics and Optical Instruments

Related Questions

• The critical angle for a medium is ${{60}^{o}}$. The refractive index of the medium is

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• Finger prints on a piece of paper may be detected by sprinkling fluorescent powder on the paper and then looking it into

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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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• To increase both the resolving power and magnifying power of a telescope

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• If the central portion of a convex lens is wrapped in black paper as shown in the figure

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