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Question
State the relation between the refractive index μ and the velocity of light (vm) in that medium.
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Solution
`μ="Velocity of light in a vacuum (or air)"/"Velocity of light in the medium"="C"/"v"_"m"`
`"v"_"m"="C"/μ`
RELATED QUESTIONS
Explain the term absolute refractive index of a medium and write an expression to relate it with the speed of light in vacuum.
State the dependence of angle of deviation On the refractive index of the material of the prism.
Draw the diagram of refraction of light in the glass slab
Light of a single colour is passed through a liquid having a piece of glass suspended in it. On changing the temperature of liquid, at a particular temperature the glass piece is not seen. When is the glass piece not seen?
After tracing the path of rays of light through a glass slab for three different angles of incidence, a student measured the corresponding values angle of refraction r and angle of emergence e and recorded them in the table given below:
|
S. No. |
∠i |
∠i |
∠e |
|
I |
30° |
20° |
31° |
|
II |
40° |
25° |
40° |
|
III |
50° |
31° |
49° |
The correct observations are:
(A) I and II
(B) II and III
(C) I and III
(D) I, II and III
-
- the angle of refraction and
- the angle of deviation for the ray?
Draw a diagram to show the splitting of white light into its constituent colours.
A total reflecting equilateral prism can be used to deviate a ray of light through:
A ray of light PQ is incident normally on the hypotenuse of a right-angled prism ABC as shown in the diagram given below:
(i) Copy the diagram and complete the path of the ray PQ till it emerges from the prism.
(ii) What is the value of the angle of deviation of the ray?
(iii) Name an instrument where this action of the prism is used.
