Advertisements
Advertisements
Question
Fill in the blanks to complete the following sentence
When light travels from a denser to a rarer medium, its speed ……………….
Advertisements
Solution
When light travels from a denser to a rarer medium, its speed increases
RELATED QUESTIONS
Select from the following the best experimental setup for tracing the path of a ray of light passing through a rectangular glass slab.
(a) P
(b) Q
(c) R
(d) S
State the dependence of angle of deviation On the wavelength of light
Light passes through a rectangular glass slab and through a triangular glass prism. In what way does the direction of the two emergent beams differ and why?
For which colour of white light, is the refractive index of a transparent medium the most?
A light ray in passing from water to a medium
(a) speeds up
(b) slows down. In each case, give one example of the medium.
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
What is the correct reason for blinking / flickering of stars? Explain it.
a) The blasts in the stars.
b) Absorption of star light by the atmosphere.
c) Motion of the stars.
d) Changing refractive index of gases in the atmosphere.
Using the curve, how do you infer that for given prism, the angle of minimum deviation δmin is unique for the given light?
What is meant by the refraction of light?
State the relation between the refractive index μ and the velocity of light (vm) in that medium.
