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प्रश्न
Write the basic cause of refraction of light.
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उत्तर
संबंधित प्रश्न
When rays of light are incident on a glass slab then the incident ray and emergent ray are _________ each other.
- perpendicular
- parallel
- opposite
- concurrent
Write a relationship between the angle of incidence and angle of refractions for a given pair of media
Draw the diagram given below and clearly show the path taken by the emergent ray.
What do you understand by the statement the refractive index of glass is 1.5 for white light?
The diagram alongside shows the refraction of a ray of light from air to a liquid.
- Write the values of (i) angle of incidence, (ii) angle of refraction.
- Use Snell’s law to find the refractive index of liquid with respect to air.
What is meant by the statement the critical angle for diamond is 24°?
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 critical angle for glass-air interface is :
Choose the correct alternative and rewrite the following:
A glass slab is placed in the path of convergent light. The point of convergence of light
State the relation between the refractive index μ and the velocity of light (vm) in that medium.
What should be the ratio of the speed of light through the liquid to the speed through the glass so that there is no refraction of light at the boundaries of the glass block when the system is illuminated by the light of one colour?
Can the absolute refractive index of a medium be less than one?
Name two instruments of the total refracting prism in which is used.
How will you verify the laws of refraction or how the refractive index of glass is determined in the laboratory?
Explain with the help of a diagram of how fish is able to see the objects above it.
Which colour of white light travels fastest in any medium except air?
