Advertisements
Advertisements
प्रश्न
State whether the following statement is true or false:
Refraction occurs because light slows down in denser materials.
Advertisements
उत्तर
True.
The refraction of light is due to the change in the speed of light on going from one medium to other. The speed of light ray slows down in denser materials.
APPEARS IN
संबंधित प्रश्न
Which property of light makes a pencil cast a shadow when it is held in front of a light source?
State the uses of plane mirrors.
The angle of reflection is equal to the angle of incidence:
(a) always
(b) sometimes
(c) under special conditions
(d) never
A ray of light goes from water into air. Will it bend towards the normal or away from the normal?
State two effects caused by the refraction of light.
In which material do you think light rays travel faster-glass or air?
Fill in the following blank with suitable word:
Light bends when is passes from water into air. We say that it is ............
What is meant by 'refraction of light'? Draw a labelled ray diagram to show the refraction of light.
State two factors on which the lateral displacement of the emergent ray depends.
Light travelling from a denser medium to a rarer medium along a normal to the boundary:
(a) is refracted towards the normal
(b) is refracted away from the normal
(c) goes along the boundary
(d) is not refracted
Light travels at a lower speed in water than in air.
The phenomenon of change in the direction of light when it passes from one transparent medium to another is called ___________.
Light changes its direction when going from one transparent medium to another transparent medium. This is called _______.
Explain the working of a periscope.
The refractive index of four substances A, B, C, and D are 1.31, 1.43, 1.33, 2.4 respectively. The speed of light is maximum in
The angle of incidence from air to glass at the point O on the hemispherical glass slab is.
Mirage is an example of refraction and the total internal reflection of light.
A water tank appears shallower when it is viewed from the top due to refraction.
