Questions in Ray Optics and Optical Instruments

Select	Question
	The band spectra (characteristic of molecular species) is due to emission of radiation
	Line spectrum was first of all theoretically explained by
	The spectrum of iodine gas under white light will be
	Continuous spectrum is not due to
	Fraunhofer lines are produced by
	A medium is said to be dispersive, if
	A ray of light is incident at an angle of 60° on one face of a prism of angle 30°. The ray emerging out of the prism makes an angle of 30° with the incident ray. The emergent ray is
	In a thin prism of glass (refractive index 1.5), which of the following relations between the angle of minimum deviations ${{\delta }_{m}}$ and angle of refraction $r$ will be correct
	The figures represent three cases of a ray passing through a prism of angle A. The case corresponding to minimum deviation is
	Dispersion can take place for