Question

At the time of sunrise and sunset, the

light from sun has to travel.

(a) longest distance of atmosphere

(b) shortest distance of atmosphere

(c) both (a) and (b)

(d) can't say​

Answer 1

a)longest distance of atmosphere

Explanation:

because they are very close to the horizon. Therefore, light other than red is mostly scattered away. Most of the red light, which is the least scattered, enters our eyes. Hence, the sun appears red.

Answer 2

At the time of sunrise and sunset, the light from sun has to travel LONGEST DISTANCE OF ATMOSPHERE.

But why?

• At noon time or another time (except sunrise and sunset), the earth usually receives the direct rays of the sun as a result of which the sun rays have to travel a comparatively short distance.

• However, during sunset or sunrise the sun rays have to travel through a longer distance of the atmosphere along a tangential course.

• As a result, during these periods the sun rays undergo extensive refraction and dispersion. This leads to orange colouring of the sky.

$\star$ Hope It Helps.