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Yellow light is refracted thorough a prism producing minimum deviation. If and denote the angle of incidence and emergence for this prism, then
(a)
(b)
(c)
(d)

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Important Questions on Ray Optics and Optical Instruments
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A prism of the refractive index has a refracting angle of . At what angle a ray must be incident on it so that it suffers a minimum deviation?

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At what angle will a ray of light be incident on one face of an equilateral prism, so that the emergent ray may graze the second surface of the prism

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A glass prism of refractive index is immersed in water of refractive index A light ray incident normally on face is totally reflected at face if

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Which of the following phenomenon of light forms a rainbow ?

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A person can see clearly only up to a distance of He wants to read a book placed at a distance of What kind of lens does he require for this purpose and what must be its power ?

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An astronomical telescope has an objective of focal length and an eye piece of focal length The final image of a star is seen from the eyepiece. The magnifying power of the telescope is

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When a telescope is adjusted for normal vision, the distance of the objective from the eye-piece is found to be The magnifying power of the telescope is What are the focal lengths of the lenses ?

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The focal lengths of the objective and eye lenses of a telescope are respectively and . The maximum magnifying power of the telescope will be
