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प्रश्न
How does the angle of minimum deviation of a glass prism vary if the incident violet light is replaced by red light?
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उत्तर
Hence relative refractive index between the prism and red light is less than the relative refractive index between the prism and violet light.
The angle of minimum deviation is directly proportional to the relative refractive index by the relation:-
δ = (μ−1)A (where A is the angle of the prism)
Therefore the angle of minimum deviation for red light is less than the violet.
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संबंधित प्रश्न
Two monochromatic rays of light are incident normally on the face AB of an isosceles right-angled prism ABC. The refractive indices of the glass prism for the two rays '1' and '2' are respectively 1.38 and 1.52. Trace the path of these rays after entering through the prism.
Figure shows a ray of light passing through a prism. If the refracted ray QR is parallel to the base BC, show that (i) r1 = r2 = A/2 and (ii) angle of minimum deviation, Dm = 2i − A.
The angular dispersion produced by a prism ___________ .
By properly combining two prisms made of different materials, it is possible to
(a) have dispersion without average deviation
(b) have deviation without dispersion
(c) have both dispersion and average deviation
(d) have neither dispersion nor average deviation
The minimum deviations suffered by, yellow and violet beams passing through an equilateral transparent prism are 38.4°, 38.7° and 39.2° respectively. Calculate the dispersive power of the medium.
The deviation produced for violet, yellow and red lights for crown glass are 3.75°, 3.25° and 2.86° respectively. Calculate the dispersive power of the crown glass.
In a regular prism, what is the relation between angle of incidence and angle of emergence when it is in the minimum deviation position?
A narrow beam of monochromatic light, PQ, is incident normally on one face of an equiangular glass prism of refractive index 1.45. When the prism is immersed in a certain liquid, the ray makes a grazing emergence along the other face (See figure). Find the refractive index of this liquid. 
What is meant by the dispersive power of transparent material?
For any prism, obtain a relation between the angle of the prism (A), the angle of minimum deviation (δm) and the refractive index of its material (μ or n).
