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UPSC 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
(a)Only III is correct
(b)I and II are correct
(c)I and III are correct
(d)I, II and III are correct
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Not attemptedCorrect Answer: (b) I and II are correct
Half-way between Earth and the Sun there is (practically) no atmosphere, so the sky appears jet black and stars do not twinkle—twinkling is an atmospheric refraction effect. The ambient temperature need not be "much higher" than Earth’s surface because in a vacuum heat transfer by conduction/convection is absent; only direct solar radiation warms exposed surfaces. Therefore statements I & II are correct, III is not. ([licchavilyceum.com](https://licchavilyceum.com/upsc-civil-services-prelims-1996-solved-question-paper/))
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Frequently Asked Questions
What is the correct answer to this UPSC 1996 Science & Technology question?▼
The correct answer is option (b): I and II are correct. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Space Technology & Astronomy question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 1996, GS Paper 1, as Question 125. It falls under Science & Technology > Space Technology & Astronomy.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Space Technology & Astronomy?▼
UPSC has asked 69 questions from Space Technology & Astronomy (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.