Scattering of Light

Q. The sun appears red during sunrise and sunset due to the of sunlight.

1. scattering
2. reflection
3. absorption

Q. A person standing in front of a mirror finds his image larger than himself. This implies that the mirror is ______.

1. concave
2. cylindrical with bulging side outwards
3. plane
4. convex

Q.

To an astronaut space appears to be of which colour???

Q.

What are the primary colours? Can we from secondary colours from the primary colours?

Q.

The bluish colour of water in deep sea is due to __________.

1. absorption of light by the sea

2. the presence of algae and other plants found in water

3. reflection of sky in water

4. scattering of light

Q.

If the earth had no atmosphere then the sky would appear as:

1. Red

2. Blue

3. Black

4. White

Q. The clear sky appears blue because

1. Blue light gets absorbed in the atmosphere

2. Ultraviolet radiations are absorbed in the atmosphere

3. Violet and blue lights get scattered more than lights of all other colours by the atmosphere

4. Light of all other colours is scattered more than the violet and blue colour lights by the atmosphere

Q. Which of the following is not a source of light?

1. Sun
2. Stars
3. Tube Light
4. Moon

Q.

Why do the clouds appear white in colour?

1. None of these

2. Clouds scatter only blue light

3. Clouds scatter all colors of light

4. Clouds don't scatter light

Q. Why we can see a red coloured light when we close the mouth of the torchlight with our hand?

Q.

Give a reason why convex mirrors are preferred over plane mirrors as rear view mirrors in cars?

Q. What type of spherical mirror is obtained by painting the inner surface of a transparent sphere?

1. Concave mirror
2. Plane mirror
3. Glass slab
4. Convex mirror

Q.

Red colour is used in danger signal because it is more attractive and common.

1. True

2. False

Q.

Which of the following options correctly describes the reason for the formation of rainbows?

1. Dispersion of light by water molecules present in clouds

2. Absorption of light by water molecules present in clouds

3. Reflection of light by water molecules present in clouds

4. None of the above

Q.

Tyndall effect is shown by ______________ .

1. milk and jelly
2. water and milk
3. water and jelly
4. only water

Q.

What are the primary colours? Name three primary colours.

Q. The parallel light rays do not remain parallel after reflection. It is a _______ reflection.

1. regular
2. smooth
3. irregular
4. real

Q.

Why does the sky appear blue from the earth?

1. When sunlight enters the atmosphere, fine air particles scatter all the colours except the blue colour thus the blue colour reaches our eyes.

2. When sunlight enters the atmosphere, fine air particles scatter blue colour more than the others. The scattered blue light enters our eyes.

3. None of these.

4. When sunlight passes through the atmosphere, the blue light gets dispersed the most.

Q. Tyndall effect is the phenomenon of scattering of light by _________.

1. solid particles
2. air particles
3. liquid particles
4. colloidal particles

Q.

An object's size and its image's size is the same in a mirror. What could be the type of mirror?

1. Plane

2. Concave

3. Convex

4. Either plane or concave

Q. A light ray is passed through a beaker having colloid of milk in water and then through a beaker having clear water. What is the colour of light seen on the other end?

1. White
2. Blue
3. Shadow
4. Red

Q. When and why is a rainbow formed? [3 MARKS]

Q.

why only we can see scattering of light only in turbid water.

Q.

Sun appears red at sunrise and sunset. This happens because the component of light having _________, gets scattered away.

1. shorter wavelengths

2. lower frequencies

3. all frequencies

4. longer wavelengths

Q. A light ray is incident on a flat surface, making an angle of ${30}^{\circ }$ with the surface. What is the angle between the surface and the normal?

1. ${30}^{\circ }$
2. ${60}^{\circ }$
3. ${90}^{\circ }$
4. ${180}^{\circ }$

Q.

This mirror is also known as drivers mirror____________.

Q.

___ of the light phenomena contributes significantly to the reddish appearance of the sun at sunrise or sunset.

Q.

At noon the sun appears white as

1. all the colors of the white light are scattered away

2. blue color is scattered the most

3. red color is scattered the most

4. light is least scattered

Q.

Why is red light scattered the least?

Q. If the light moving in a straight line bends by a small but fixed angle, it may be a case of:

1. reflection
2. refraction
3. dispersion
4. both (a) & (b)