Scattering

Q. Explain the following:
i.) Out of blue and red light, which one is scattered more and why? [2 marks]
ii.) What is colour of danger signals? Why? [2 marks]

Q.

The blue colour of the sky is due to ____ of light.

1. scattering

2. dispersion

3. tyndall effect

4. refraction

Q. Which phenomenon is responsible for the blue colour of the sky?

1. Dispersion
2. Scattering of sunlight
3. Refraction
4. Tyndall effect

Q. As there is no atmosphere on the moon, stars do not appear to twinkle when seen from there.

1. False
2. True

Q.

At noon the sun appears white as:

1. light is least scattered

2. all the colours of the white light are scattered away

3. blue colour is scattered the most

4. red colour is scattered the most

Q.

Match the following statements with correct terms associated with it.

$\begin{array}{cc}\text{Statement}& \text{Options}\\ \text{(A)Light makes tiny particles visible due to}& \text{(1)Scattering}\\ \text{scattering.}& \\ \text{(B)The effect of seeing an objects is retained by the}& \text{(2)Dispersion}\\ \text{eye for}\frac{1}{{16}^{th}}\text{of a second.}& \\ \text{(C)Composite light splits up into component}& \text{(3)Persistence of vision}\\ \text{colours.}& \\ \text{(D)Irregular and partial reflection of light}& \text{(4)Tyndall effect}\end{array}$

1. A-4, B-3, C-2, D-1

2. A-2, B-1, C-4, D-3

3. A-4, B-1, C-3, D-2

4. A-2, B-3, C-4, D-1

Q.

Red color is used in danger signal because it scatters to a wider angle.

1. True

2. False

Q. Earth's atmosphere scatters the sunlight.

1. False
2. True

Q.

Why does the sun appear yellowish-white during the noontime?

1. Because sunlight has to travel relatively shorter atmospheric distance.

2. Because sunlight has to travel longer atmospheric distance.

3. Because only red and violet are scattered.

4. Because all the colours are scattered by the cloud.

Q.

In which of the following, scattering of light does not takes place?

1. Blue colour of the sky

2. Colour of deep sea

3. Reddening of the sun

4. Rainbow