A prism of angle `60^(@)` is made of glass of refractive index 1.50 for red and 1.56 for violet. Find the angular separation of these rays when a narrow pencil of composite light is incident at minimum deviation.

A glass prism with a refracting angle of 60^(@) has a refractive index 1.52 for red and 1.6 for violet light. A parallel beam of white is incident on one face at an angle of incident which gives minimum deviation for red light. Find : [Use : sin(50^(@))=0.760 , sin(31.6^(@))=0.520 , sin (28.4^(@))=0.475 , sin (56^(@))= 0.832 , = 22//7 ] The angle of incidence at the prism is :

A glass prism with a refracting angle of 60^(@) has a refractive index 1.52 for red and 1.6 for violet light. A parallel beam of white is incident on one face at an angle of incident which gives minimum deviation for red light. Find : [Use : sin(50^(@))=0.760 , sin(31.6^(@))=0.520 , sin (28.4^(@))=0.475 , sin (56^(@))= 0.832 , = 22//7 ] The angular width of the spectrum is :

A glass prism with a refracting angle of 60^(@) has a refractive index 1.52 for red and 1.6 for violet light. A parallel beam of white is incident on one face at an angle of incident which gives minimum deviation for red light. Find : [Use : sin(50^(@))=0.760 , sin(31.6^(@))=0.520 , sin (28.4^(@))=0.475 , sin (56^(@))= 0.832 , = 22//7 ] The length of the spectrum if it is focussed on a screen by a lens of focal length 100 cm is :

A prism of refracting angle 4^(@) is made of a material of refractive index 1.652. Find its angle of minimum deviation.

A prism is made of glass of refractive index 1.5. If the angle of minimum deviation is equal to the refracting angle of the prism, calculate the angle of the prism.

A double convex lens is made of glass which has refractive index 1.55 for violet rays and 1.50 for red rays.If the focal length of violet rays is 20cm the focal length of red rays is

A double convex lens is made of glass which has refractive index 1.55 for violet rays and 1.50 for red rays.If the focal length of violet rays is 20cm the focal length of red rays is

If a small angled prism, made of glass is immersed in a liquid of refractive index 1 and a ray of light is made incident on it, then

(a) If the refracting angle of a prism is 60^@ and the minimum deviation is 30^@ , then find the angle of incidence. (b) A ray of light passes through an equilateral prism such that the angle of emergence is equal to the angle of incidence and each is equal to 3//4^(th) of the angle of prism. Find the angle of deviation. (c) The refracting of a prism is A and the refractive index of the material of the prism is cotA//2 . Find the angle of deviation. (d) The angle of a prism is 60^@ . What is the angle of incidence for minimum deviation? The refractive index of the material of the prism is sqrt2 .