Exam-style question
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Define a black hole and a neutron star. What is the key difference between them?.
Model answer
What a good answer should say
- A black hole is a region in space where the gravitational pull is so strong that nothing, not even light, can escape from it.
- A neutron star is a compact stellar remnant composed primarily of neutrons, which has a strong gravitational field but allows light to escape.
- The key difference is that a black hole has an escape velocity greater than the speed of light, while a neutron star does not.
Explanation
Why this works
This answer clearly defines both a black hole and a neutron star, emphasizing the critical difference in their gravitational properties. It explains when each applies in the context of stellar evolution, concluding that the defining characteristic of a black hole is its ability to trap light due to its extreme gravity.
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