Consider the following statements : A person in a spaceship located half way between the earth and the sun will notice that the I. > Sky is jet black. II. > Stars do not twinkle. III. > Temperature outside the spaceship is much higher than that on the sur

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Q: 125 (IAS/1996)
Consider the following statements : A person in a spaceship located half way between the earth and the sun will notice that the
I. Sky is jet black.
II. Stars do not twinkle.
III. Temperature outside the spaceship is much higher than that on the surface of the earth.
Of these statements

question_subject: 

Geography

question_exam: 

IAS

stats: 

0,56,148,37,82,29,56

keywords: 

{'spaceship': [0, 1, 1, 0], 'sun': [3, 0, 0, 6], 'stars': [0, 0, 0, 1], 'temperature': [0, 1, 1, 7], 'earth': [0, 1, 1, 1], 'jet black': [0, 1, 0, 0]}

The statements are about an individual`s observations from a location in space, halfway between Earth and the sun.

Statement I: The sky appears jet black in space because there is no atmosphere to scatter sunlight. On Earth, scattered light creates the blue color of the sky. But in space, light doesn`t scatter because there are no particles to do so, hence our sky would appear black.

Statement II: Twinkling of stars, also known as stellar scintillation, is caused by the passage of light through the Earth`s atmosphere. This effect produces shifts in stars` apparent position. In space, without an atmosphere, the stars would not twinkle but appear as steady points of light.

Statement III: Space is typically thought of as cold. Yet, when directly exposed to the sun`s radiation, without an atmosphere for protection and to moderate temperature, it can become quite hot. Hence, the temperature outside the spaceship can be much higher than on Earth`s surface.

Therefore, all three statements are correct, making option 4 the right answer.

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