Home
Class 12
PHYSICS
When a ray of sun light passes through t...

When a ray of sun light passes through the prism, each colour of light has its own speed in the glass. The seven colours come out of the prism with different angles of deviation. Red deviates least and blue deviates maximum. Thus a prism can disperse a white light into seven colours which is called colour spectrum.

For a thin prism, the angle of deviation is given as `delta=(n-1)A`. The angle of dispersion is given as `phi=delta_(v)-delta_(r)`. The dispersive power of a prism is `omega=(phi)/(delta_("mean"))=(phi)/(delta_(y))`
Using the above ideas, give answer the following questions.
A prism has R.I. for violet and red `n_(v)=1.523, n_(r)=1.5145`. If the angle of prism is `A=2^(@)` the dispersive power of the prism is :

A

0.01639

B

1.593

C

0.1639

D

0.18

Text Solution

Verified by Experts

The correct Answer is:
A, C
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • GEOMETRICAL OPTICS

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE EXERCISE -I (LEVEL-II LECTURE SHEET (ADVANCED) MATRIX MATCHING TYPE QUESTIONS)|1 Videos

  • GEOMETRICAL OPTICS

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE EXERCISE -I (LEVEL-II LECTURE SHEET (ADVANCED) INTEGER TYPE QUESTIONS)|4 Videos

  • GEOMETRICAL OPTICS

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE EXERCISE -I (LEVEL-II LECTURE SHEET (ADVANCED) MORE THAN ONE CORRECT TYPE QUESTIONS)|3 Videos

  • ELEMENTS OF VECTORS

    AAKASH SERIES|Exercise QUESTIONS FOR DESCRIPTIVE ANSWERS|10 Videos

  • LAWS OF MOTION

    AAKASH SERIES|Exercise PRACTICE EXERCISE|106 Videos

Similar Questions

Explore conceptually related problems

When light is passed through a prismm when………colour shows maximum deviation.

During dispersion of white light by a prism, the red colour deviates most.

The phenomenon due to which white light splits into seven colours on passing through a prism is called spectrum.

A ray of light passes through the equilateral prism such that angle of incidence is equal to the angle of emergence if the angle of incidence is 45^(@) . The angle of deviation will be

The angle between the incident ray and the refracted ray of a prism is called angle of deviation.

If a light ray incidents normally on one of the faces of the prism of refractive index 2 and the emergent ray just grazes the second face of the prism, then the angle of deviation is

If a light ray incidents normally on one of the faces of the prism of refractive index 2 and the emergent ray just grazes the second face of the prism, then the angle of deviation is

When the white light is passed through an equilateral prism it splits into seven colours. The phenomenon of splitting of white light is called :

The band of seven colours obtained on a screen when white light passes through a prism is called spectrum. ____

During dispersion of white light, which colour (a) deviates least, (b) deviates most?

Home
Profile