Set 5: Inferences (Intermediate)
Explanation
PASSAGE
Black holes were long considered one-way traps from which nothing could escape—not even light. However, Stephen Hawking proposed that black holes slowly emit radiation due to quantum effects near their event horizons, meaning they gradually evaporate over immense timescales. This 'Hawking radiation' remains theoretically predicted but experimentally unconfirmed.
What can be inferred about Hawking radiation?
Detailed Explanation
This question asks you to draw a logical conclusion from the text. Challenges 'one-way trap' assumption; predicted but 'experimentally unconfirmed' = theoretical challenge to old view. A valid inference must be supported by evidence in the passage, even if not stated directly. Look for clues in the text that strongly suggest the answer. Avoid conclusions that require assumptions beyond what's written. Valid inferences are strongly supported by multiple pieces of evidence in the text. Be cautious of choices that go too far beyond what the passage actually states. The best inference is the one most directly supported by textual evidence.
Key Evidence:
• "nothing could escape"
• "black holes slowly emit radiation"
• "theoretically predicted but unconfirmed"
Why others are wrong: A ('Gradually' and 'immense timescales.'), C ('Experimentally unconfirmed.'), D (Hawking radiation (if real) escapes.).