Sunset is red because at that time the light coming from the sun has to travel:
(a) lesser thickness of earth's atmosphere
(b) greater thickness of earth's atmosphere
(c) varying thickness of earth's atmosphere
(d) along the horizon

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Solution

(b) greater thickness of the earth's atmosphere

The sun appears red at sunset because, at that time, the sun is near the horizon and, therefore, sunlight has to travel through a greater thickness of the earth's atmosphere.

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Sunset is red because at that time the light coming from the sun has to travel: (a) lesser thickness of earth's atmosphere (b) greater thickness of earth's atmosphere (c) varying thickness of earth's atmosphere (d) along the horizon

(b) greater thickness of the earth's atmosphere The sun appears red at sunset because, at that time, the sun is near the horizon and, therefore, sunlight has to travel through a greater thickness of the earth's atmosphere.

Sunset is red because at that time the light coming from the sun has to travel:
(a) lesser thickness of earth's atmosphere
(b) greater thickness of earth's atmosphere
(c) varying thickness of earth's atmosphere
(d) along the horizon

(b) greater thickness of the earth's atmosphere

The sun appears red at sunset because, at that time, the sun is near the horizon and, therefore, sunlight has to travel through a greater thickness of the earth's atmosphere.