Question

Q1. why do stars twinkle?
Q2. explain why the planets do not twinkle?
Q3. why does the sun appear reddish early in the morning?

Answer 1

Answer:

1-As light from a star races through our atmosphere, it bounces and bumps through the different layers, bending the light before you see it. Since the hot and cold layers of air keep moving, the bending of the light changes too, which causes the star's appearance to wobble or twinkle.

2-Planets appear larger to human eyes as compared to stars because they are closer. As the angle subtended by the planets at the human eye is more, the shift in their position(as compared to stars) is smaller. Since, the shift is smaller, they do not twinkle.

3-D During sunrise, the light rays coming from the Sun have to travel a greater distance in the earth's atmosphere before reaching our eyes. In this journey, the shorter wavelengths of lights are scattered out and only longer wavelengths are able to reach our eyes. ... Therefore, the Sun appears reddish early in the morning.

Hope it helps you friend

Answer 2

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Q1.) Why do stars twinkle?

⇝ The stars twinkle at night, because the star light reaching our eyes increases and decreases continuously due to atmospheric refraction. when the star light reaching our eyes increases, the star looks bright and when the star light reaching are eyes decreases, The star looks dim.

Thus, the stars go on becoming bright and dim again and again.

This is called the twinkling of stars at night.

Lights from stars travel first in vacuum and then enters into earth's atmosphere as optical density of air increases towards the surface of earth. Therefore, light from the star from rarer to denser layers becoming bend every time to its normal.

the apparent position of stars and amount of light changes continuously. This leads to twinkling of stars.

Q2.) Explain why the planets do not twinkle?

⇝ Planets appear brighter than the stars as planets are close to earth compared to other stars. A planet can be considered to be made up of a number of point sources of light. Due to atmospheric refraction, when some of the point source looks brighter other appears dimmer.

Therefore, on the whole, overall brightness of the planet remains same always. The planet do not appear to twinkle.

Q3.) Why does the sun appear reddish early in the morning?

⇝ At the time of sunrise and sunset, the sun is near the Horizon. Then rays from the sun have to travel such a large distance of the atmosphere to reach an observer on the earth.

Therefore, most of the blue light is scattered away. The red colour which has the largest wavelength is scattered the least. one of all colours of the sunlight, the colour scattered least that is red colour, enter into our eyes.

Hence, the sun appear reddish at the time of sunrise and sunset.

$\star\mathbb\purple{HOPE \: \: IT \: \: HELPS}\star$