Question

Q.1. Which of the following statement is/are correct in given diagram-
i. Sun near the horizon passes through thicker layers of air.
ii. Sun appears white as only a little of the blue and violet colours are scattered.
iii. The light that reaches our eye is a shorter wavelength.
iv. The sky appears yellow during sunrise.
a. (iii) and (i)
b. (i) and (ii)
c. (iv) and (iii)
d.(iv) and (iii)​

Answer 1

Answer:

b .(i)and (ii)

explain

The blue colour of the sky is due to the scattering of light by small particles of the atmosphere (air molecules). When white light (from the sun) enters the earth's atmosphere, it gets scattered away due to the atmospheric particles. Since blue colour has the minimum wavelength, so blue colour scatters the most and thus the sky appears blue.

Answer 2

i. Sun near the horizon passes through thicker layers of air.

iv. The sky appears yellow during sunrise.

The correct statements are d. (iv) and (i).

Explanation:

• Sunlight near the horizon passes through thicker layers of air.
• Sun is low on the horizon during sunset and sunrise.
• During the day, sun is higher in the sky.
• Sunlight passes through more air at sunset and sunrise than during the day.
• Earth's atmosphere scatters blue light more efficiently than red light. And so sun appears to be white
• Since atmosphere is more, more molecules are there to scatter violet and blue light away from eyes.
• This is why sunsets are often yellow, orange, and red.
• The light that reaches our eye is a of longer wavelengths, shorter wavelengths are scattered by atmosphere.