Questions in Ray Optics and Optical Instruments

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When light of wavelength $\lambda $ is incident on an equilateral prism kept in its minimum deviation position, it is found that the angle of deviation equals the angle of the prism itself. The refractive index of the material of the prism for the wavelength $\lambda $ is, then
Which of the following diagrams, shows correctly the dispersion of white light by a prism Question Image
A neon sign does not produce
The refractive index of flint glass for blue F line is 1.6333 and red C line is 1.6161. If the refractive index for yellow D line is 1.622, the dispersive power of the glass is
A triangular prism of glass is shown in the figure. A ray incident normally to one face is totally reflected, if $\theta ={{45}^{o}}$. The index of refraction of glass is Question Image
The wavelength of emission line spectrum and absorption line spectrum of a substance are related as
White light is passed through a prism whose angle is 5°. If the refractive indices for rays of red and blue colour are respectively 1.64 and 1.66, the angle of deviation between the two colours will be
From which source a continuous emission spectrum and a line absorption spectrum are simultaneously obtained
A thin prism ${{P}_{1}}$ with angle 6° and made from glass of refractive index 1.54 is combined with another thin prism P2 of refractive index 1.72 to produce dispersion without deviation. The angle of prism ${{P}_{2}}$ will be
If the refractive index of a material of equilateral prism is $\sqrt{3}$, then angle of minimum deviation of the prism is

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