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Earn 100

Derive the relation between refractive index and minimum deviation. (Prism formula)

Important Questions on Ray Optics and Optical Instruments

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Show by drawing ray diagram how a totally reflecting glass prism can be used to deviate a ray of light through (i) 90° (ii) 180° and invert it.
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Describe a reflecting type telescope what are its advantages?
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Derive the expression for focal length of a spherical mirror F=R2.
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Draw labelled diagram and write working of eye.
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Draw the labelled diagram of cassegrain telescope. Write the advantages of cassegrain telescope.
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Discuss the methods of image tracing in convex lens and concave lens.
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Derive the equivalent focal length of lenses in contact.
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The refractive index of a prism for a monochromatic wave is 3 and its refracting angle is 60°. For minimum deviation, the angle of incidence will be