Home
Class 12
PHYSICS
White light is passed through a prism of...

White light is passed through a prism of angle `5^@`. If the refractive indices for red and blue colours are `1.641` and `1.659` respectively, calculate the angle of deviation between them, also calculate the dispersive power.

Text Solution

Verified by Experts

As for small angle of prism `delta = (mu - 1)A`,
`delta_(B) = (1.659-1)xx 5^(@) = 3.295^(@) "and" delta_(R) = (1.641 -1)xx5^(@) = 3.205^(@)`
so `theta = delta_(B) - delta_(R)= 3.295^(@) = 0.090^(@)`
Promotional Banner

Topper's Solved these Questions

  • GEOMETRICAL OPTICS

    ALLEN |Exercise SOME WORKED OUT EXAMPLES|84 Videos

  • GEOMETRICAL OPTICS

    ALLEN |Exercise EXERCISE -01|65 Videos

  • CURRENT ELECTRICITY

    ALLEN |Exercise EX.II|66 Videos

  • GRAVITATION

    ALLEN |Exercise EXERCISE 4|9 Videos

Similar Questions

Explore conceptually related problems

The refractive indicates of flint glass for red and violent colours are 1.644 "and" 1.664 . Calculate its dispersive power.

A prism of refractive index 1.53 is placed in water of refractive index 1.33 . If the angle of prism is 60^@ , calculate the angle of minimum deviation in water.

When white light passes through prism, which colour of light will experience minimum deviation ?

Prism angle of a prism is 10^(@) ,Their refractive index for red & violet color is 1.51 & 1.52 respectively .Then dispersive power will be (1) 0.5, (2)0.15, (3)0.019,(4) 0.032

A thin convex lens made from crown glass (mu = 3//2) has focal length f . When it is measured in two different liquids having refractive indiced 4//3 and 5//3 , it has the focal length f_(1) and f_(2) respectively. The correct ralation between the focal lengths is

A narrow beam PQ of white light passes through a glass prism ABC as shown in the diagram. Trace it on your answer sheet and show the path of the emergent beam as observed on the screen DE. (1) Write the name and cause of the phenomenon observed. (2) Where else in nature is this phenomenon observed ? (3) Based on this observation, state the conclusion which can be drawn about the constituents of white light.

For a prism, angle of prism is 60^@ and it.s refractive index is 1.5, find (1) angle of incidence corresponding to the angle of minimum deviation and (2) angle of emergence for angle of maximum deviation.

If deviation by a prism with small prism angle with refractive index 1.6 is 3.6^@ , then prism angle is ….....

For a light ray passing through the prism, the angle between the incident ray and the emergent ray is known as the .........