Border line which separates outer space from Earth's atmosphere is known as___________?
Correct answer: D. Karman line
- A. Durand line
- B. Space line
- C. Venus line
- D. Karman line
Explanation
The Kármán line, conventionally placed at about 100 km altitude, is widely used as the boundary of outer space. The other named lines are not recognized atmospheric-space boundaries.
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