Questions in Ray Optics and Optical Instruments

Select	Question
	In the formation of a rainbow light from the sun on water droplets undergoes
	The Cauchy’s dispersion formula is
	A prism of refractive index $\mu$ and angle A is placed in the minimum deviation position. If the angle of minimum deviation is A, then the value of A in terms of $\mu$ is
	A given ray of light suffers minimum deviation in an equilateral prism P. Additional prisms Q and R of identical shape and material are now added to P as shown in the figure. The ray will suffer
	In the given figure, what is the angle of prism
	A prism of refractive index $\sqrt{2}$ has a refracting angle of $60^o$. At what angle a ray must be incident on it so that it suffers a minimum deviation
	A convex lens, a glass slab, a glass prism and a solid sphere all are made of the same glass, the dispersive power will be
	A parallel beam of white light falls on a convex lens. Images of blue, yellow and red light are formed on other side of the lens at a distance of 0.20 m, 0.205 m and 0.214 m respectively. The dispersive power of the material of the lens will be
	The refractive index of the material of the prism for violet colour is 1.69 and that for red is 1.65. If the refractive index for mean colour is 1.66, the dispersive power of the material of the prism
	If the angle of prism is ${{60}^{o}}$ and the angle of minimum deviation is ${{40}^{o}}$, the angle of refraction will be