Colour of Sun at Sunrise and Sunset

Q.

What is monochromatic light?

Q.

Why does the sun appear red at the time of sunset and sunrise? Explain.

Q.

The bluish color of water in the deep sea is due to

1. The presence of algae and other plants found in water

2. Reflection of sky in water

3. Scattering of light

4. Absorption of light by the sea

Q.

Why does the Sun appear reddish in the early morning?

Q.

How can we explain the reddish appearance of the sun at sunrise or sunset? Why does it not appear red at noon?

Q.

Why does the sun appear reddish early in the morning? Will this phenomenon be observed by an astronaut on the moon? Give a reason to justify your answer?

Q.

Sun appears to be white and sky appears to be black in space because

1. The particles present in space do not scatter light effectively

2. Sun light is of a single wavelength in space

3. There is no atmosphere to refract the sun's light in space

4. There is no atmosphere to scatter the sun's light in space

5. Light does not deviate in space

Q. The red colour of the sun at the time of sunrise and sunset is because red colour is:

1. scattered mostly
2. scattered least
3. Both (a) and (b)
4. Neither (a) nor (b)

Q.

Draw a labeled diagram to show (i) the reddish appearance of the sun at the sunrise or the sunset and (ii) the white appearance of the sun at noon when it is overhead.

Q.

Why does the sun appear yellowish-white at the noon?

1. because all the colours are scattered by the cloud

2. because only red and violet is scattered

3. because sunlight has to travel relatively shorter atmospheric distance

4. because sunlight has to travel longer atmospheric distance

Q.

Why are danger signals always red in colour ?

Q. Sunlight has to travel distance in the atmosphere during sunrise or sunset as compared to the noon.

1. smaller
2. larger
3. equal

Q.

State True or False:

Scattering of light causes the blue colour of the sky and the reddening of the sunduringg sunrise and sunset.

1. True

2. False

Q.

Why does the sun appear red at sunrise and sunset?

Q.

Why does the sun appear red during the sunrise and the sunset?

1. Most of the shorter wavelengths are scattered.

2. Sun rays have to travel larger distance in the earth's atmosphere.

3. Sunlight near the horizon passes through the thicker layer of air.

4. All of the above.

Q.

During sunrise and sunset, the colour of sun appears to be ______ .

1. blue

2. red

3. white

4. yellow

Q. The sky appears red at sunrise and sunset. Because the red light scatters less and enter our eyes.

1. True
2. False

Q. Which of the following is true for light after scattering?

1. Its speed changes.
2. Its wavelength changes.
3. Its direction changes.
4. None of the above.

Q.

The red color of the sun at the time of sunrise and the sunset is because the red color is ___ scattered.

1. mostly

2. least

3. not

4. always

Q.

Scattering of light causes reddening of Sun at the time of sunrise and sunset.

1. True

2. False

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

1. scattering
2. reflection
3. absorption

Q.

Which coloured light has largest wavelength in the visible spectrum?

Q.

The red color of the sun at the time of sunrise and the sunset is because the red color is ___ scattered.

1. always

2. mostly

3. not

4. least

Q.

At evening, the Sun appears red because of _________ of light.

1. reflection

2. scattering

3. diffraction

4. refraction

Q. To an astronaut, why does the sky appear dark instead of blue?

Q.

Scattering of light causes reddening of Sun at the time of sunrise and sunset.

1. True

2. False

Q.

During sunrise and sunset, the sky appears red while during the day, it appears blue. Explain these natural phenomena.

Q. Sunlight scatters the most during the noon time.

1. True
2. False

Q.

Sun is always red in color.

1. True

2. False

Q. In the white light of sun, maximum scattering by the air molecules present in the earth’s atmosphere is for: