Advertisements
Advertisements
Question
Why does the sun appear red at sunrises and sunset?
Advertisements
Solution
At the time of sunrise and sunset, the light from sun has to travel the longest distance of atmosphere to reach the observer. The light travelling from the sun loses blue light of short wavelength due to scattering, while the red light of long wavelength is scattered a little, so is not lost much. Thus blue light is almost absent in sunlight reaching the observer, while it is rich in red colour.
RELATED QUESTIONS
Explain giving reason why the sky appears blue to an observer from the surface of the earth? What will the colour of the sky be for an astronaut staying in the international space station orbiting the earth? Justify your answer giving reason.
What is the order of colours in a rainbow, from the outside to the inside?
Which light has the longer wavelength : red light or blue light?
Explain why, if we look at objects through the hot air over a fire, the objects appear to be moving (or shaking) slightly.
When sunlight enters the earth’s atmosphere, state which colour of light is scattered
- the most and
- which the least.
What characteristic property of light is responsible for the blue colour of the sky?
The colour of sky, in direction other than of the sun, is blue. Explain.
Which phenomenon is responsible for making the path of light visible?
A beam of blue, green and yellow light passes through the earth's atmosphere. Name the colour which is scattered the most.
What is the difference in colours of the Sun observed during sunrise/sunset and noon? Give explanation for each.
