Solved UPSC CDS/OTA Question
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Q · The Universe Medium · 45s
Consider the following about black holes: 1. A black hole’s escape velocity exceeds the speed of light. 2. The Schwarzschild radius defines the event horizon of a non-rotating black hole. 3. Hawking radiation suggests black holes can lose mass over time. Which are correct?
TopicThe Universe
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
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All are correct. Black holes have escape velocities greater than light speed, the event horizon is defined by the Schwarzschild radius, and quantum effects allow for Hawking radiation.
Final Answer: Option D — 1, 2 and 3