Questions in Ray Optics and Optical Instruments

Select	Question
	Band spectrum is obtained when the source emitting light is in the form of or Band spectrum is characteristic of
	Flint glass prism is joined by a crown glass prism to produce dispersion without deviation. The refractive indices of these for mean rays are 1.602 and 1.500 respectively. Angle of prism of flint prism is 10°, then the angle of prism for crown prism will be
	The angle of minimum deviation for a prism is 40° and the angle of the prism is 60°. The angle of incidence in this position will be
	In the position of minimum deviation when a ray of yellow light passes through the prism, then its angle of incidence is
	A circular disc of which 2/3 part is coated with yellow and 1/3 part is with blue. It is rotated about its central axis with high velocity, then it will be seen as
	The fine powder of a coloured glass is seen as
	When a white light passes through a hollow prism, then
	The light ray is incidence at angle of 60° on a prism of angle 45°. When the light ray falls on the other surface at 90°, the refractive index of the material of prism $\mu $ and the angle of deviation $\delta $ are given by
	In dispersion without deviation
	Deviation of 5° is observed from a prism whose angle is small and whose refractive index is 1.5. The angle of prism is