To an astronaut in a space -ship, the earth appears :

(a) white (b) red

(c) blue (d) black

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Solution

The earth appears blue to the astronaut due to the blue color of sunlight scattered by the earth's atmosphere. Hence, the correct choice is (c).

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To an astronaut in a space -ship, the earth appears : (a) white (b) red (c) blue (d) black

The earth appears blue to the astronaut due to the blue color of sunlight scattered by the earth's atmosphere. Hence, the correct choice is (c).

To an astronaut in a space -ship, the earth appears :

(a) white (b) red

(c) blue (d) black