Questions in Ray Optics and Optical Instruments

Select	Question
	A prism of refracting angle $60^o$ is made with a material of refractive index $\mu$. For a certain wavelength of light, the angle of minimum deviation is $30^o$. For this, wavelength the value of refractive index of the material is
	Which of the prism is used to see infrared spectrum of light
	When white light enters a prism, it gets split into its constituent colours. This is due to
	The dispersive powers of crown and flint glasses are 0.02 and 0.04 respectively. In an achromatic combination of lenses the focal length of flint glass lens is 40 cm. The focal length of crown glass lens will be
	When a ray of light is incident normally on one refracting surface of an equilateral prism (Refractive index of the material of the prism = 1.5
	Consider the following two statements A and B and identify the correct choice in the given answers A : Line spectra is due to atoms in gaseous stateB : Band spectra is due to molecules
	Under minimum deviation condition in a prism, if a ray is incident at an angle $30^o$, the angle between the emergent ray and the second refracting surface of the prism is
	The angle of prism is $5^o$ and its refractive indices for red and violet colours are $1.5$ and $1.6$ respectively. The angular dispersion produced by the prism is
	If the refractive angles of two prisms made of crown glass are $10^o$ and $20^o$ respectively, then the ratio of their colour deviation powers will be
	The nature of sun’s spectrum is