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Dispersion and Spectra — JEE Main & Advanced Physics PYQs

24 previous year questions from Dispersion and Spectra with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

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1

To ensure that the deviation of the mean ray is zero, a flint glass prism and a crown glass prism are to be combined. For the mean ray, the refractive indices of the flint and crow

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For red, yellow, and violet rays, the focal lengths of a convex lens are 100 cm , 98 cm , and 96 cm respectively. Determine the dispersive power of the material of the lens.

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As the colour of light varies from red to violet, the refractive index of a certain material changes by 0.014 . A rectangular slab of height 2.00 cm constructed from this material

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A specific material exhibits refractive indices of 1.56 , 1.60 , and 1.68 for red, yellow, and violet light, respectively. Determine the dispersive power of the material.

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A specific material exhibits refractive indices of 1.56 , 1.60 , and 1.68 for red, yellow, and violet light, respectively. Evaluate the angular dispersion produced by a thin prism

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A thin prism is constructed from a material with refractive indices of 1.61 and 1.65 for red and violet light, respectively. The material's dispersive power is 0.07 . Under favoura

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When passing through an equilateral transparent prism, the minimum deviations experienced by red, yellow, and violet beams are 38.4^ , 38.7^ , and 39.2^ respectively. Determine the

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Two prisms of identical geometrical shape are combined such that their refracting angles are oppositely directed. For violet light, the materials of the prisms have refractive indi

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Three thin prisms are combined as shown in the figure. The refractive indices for red, yellow, and violet rays are _r , _y , and _v respectively for the crown glass, and _r' , _y'

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Two identical thin crown glass prisms, each with a refracting angle A , and a thin flint glass prism of refracting angle A' , are combined together. The flint glass prism is situat

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Two thin prisms, one of crown glass ( _r = 1.515 , _v = 1.525 ) and the other of flint glass ( _r = 1.612 , _v = 1.632 ), are positioned in contact. Each has a refracting angle of

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A thin prism of angle 6.0^ , = 0.07 and _y = 1.50 is combined with another thin prism having = 0.08 and _y = 1.60 . The combination produces no deviation in the mean ray. Determine

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As the colour of light varies from red to violet, the refractive index of a material M₁ changes by 0.014 , while that of another material M₂ changes by 0.024 . Two thin prisms, one

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As the colour of light varies from red to violet, the refractive index of a material M₁ changes by 0.014 , while that of another material M₂ changes by 0.024 . Two thin prisms, one

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A single prism can produce a minimum deviation in a light beam. If three such identical prisms are combined, what is the minimum deviation that can be produced in the beam?

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When a glass prism is immersed in water, its dispersive power

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The angular dispersion caused by a prism

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Examine the two statements given below: (A) Line spectra provide information regarding atoms. (B) Band spectra provide information regarding molecules.

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A converging lens has focal lengths f_v and f_r for violet and red light, respectively.

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To produce a pure spectrum, the incident light is passed through a narrow slit positioned in the focal plane of an achromatic lens because a narrow slit

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A narrow beam of white light passes through a slab that has parallel faces.

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Which of the following quantities associated with a lens depend on the wavelength or wavelengths of the incident light?

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Considering only the magnitudes, which of the following quantities increase as the wavelength is increased?

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When two prisms composed of different materials are properly combined, it is possible to

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