Chapter 20: Problem 4
Describe the evolution of a star after it becomes a white dwarf.
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Chapter 20: Problem 4
Describe the evolution of a star after it becomes a white dwarf.
These are the key concepts you need to understand to accurately answer the question.
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Get started for freeThe spectra of white dwarfs usually show large redshifts. Why doesn't this imply that most white dwarfs are moving rapidly away from us?
Suppose an astronaut falling toward a black hole used a watch to check her pulse rate. She notes that her pulse rate remains constant as she falls closer to the black hole. (Obviously, this astronaut is tough.) Why, if clocks run more slowly in strongly curved regions of spacetime, does the astronaut find that her pulse rate doesn't change?
Why is a stationary body represented by a vertical line rather than a point in a spacetime diagram?
Suppose you made a triangle in your backyard. You used a stretched string to make three geodesics to form the sides of the triangle. You then used a protractor and found that the sum of the angles of the triangle was \(180^{\circ} .\) You know that the surface of the Earth is curved, so why didn't your triangle contain more than \(180^{\circ}\) ?
Only a small percentage of the energy of a type II supernova is carried away by radiation and the shell of matter blasted outward. What happens to the rest of the energy released in the explosion?
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