Question

5.
B. Fill in the blanks
1. When a ray of light passes from a denser medium to a rarer medium, it bends
(towards/away from) the normal.
2. Even though light travels a longer route in refraction, it takes the path in which it requires
................(less time/more time).
3. In an optically denser medium, the speed of light is ...... ......... (morelless) than the
speed of light in air.
........... (Refractive density/Refractive index) tells you the amount by which the speed
of light gets reduced in a material and is constant for that material.
The refracted ray bends more in diamond than in water as the speed of light in diamond is
much ................... (more/less) than that in water.
6. The phenomenon of splitting up of white light into its constituent colours is called
........... (dispersion/refraction).
7. A swimming pool appears shallower than its actual depth due to ..
.......... (reflection/
refraction).
8. The angle between the incident ray and the emergent ray in a glass prism is called
........... (angle of incidence/angle of deviation).
9. A concave lens is always ........................ (thicker/thinner) in the middle.
10. Myopia can be corrected using a ........................ (convex/concave) lens.​

Answer 1

Answer:

1 . toward 2.less time 3.refarctive density bahi eska ulta kar do

Answer 2

Answers .

Fill in the blanks :

( 1 ) When a ray of light passes from a denser medium to a rarer medium, it bends away from the normal.

( 2 ) Even though light travels a longer route in refraction, it takes the path in which it requires less time.

( 3 ) In an optically denser medium, the speed of light is less than the speed of light in air.

( 4 ) Refractive index tells you the amount by which the speed of light gets reduced in a material and is constant for that material.

( 5 ) The refracted ray bends more in diamond than in water as the speed of light in diamond is much less than that in water.

( 6 ) The phenomenon of splitting up of white light into its constituent colours is called dispersion.

( 7 ) A swimming pool appears shallower than its actual depth due to refraction.

( 8 ) The angle between the incident ray and the emergent ray in a glass prism is called angle of deviation.

( 9 ) A concave lens is always thicker in the middle.

( 10 ) Myopia can be corrected using a concave lens.