The general theory of relativity describes gravity as
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A distortion of the shape of four-dimensional spacetime.
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Which of the following is not a prediction of general relativity?
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Gravity is slowing the rate of expansion of the universe
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The equivalence principle states that
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The effects of gravity are equivalent to the effects of acceleration.
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The path of an object through 4-dimensional spacetime is called its
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Worldline.
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What is the shape of the worldline of an object at rest, when time is plotted on the vertical axis?
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A vertical line.
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The circumference of a circle is less than 2 times Ο times the radius of the circle in a ________ geometry.
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Spherical
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In which overall shape of the universe is the universe finite?
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Spherical
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In general relativity, the orbital path of a planet
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- Is determined by the curved shape of spacetime that it is moving through.
- Never returns to the same point in four-dimensional spacetime.
- Is the straightest possible path through four-dimensional spacetime.
**Answer: All of the Above
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Far from a black hole, the curvature of spacetime
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Is the same as it would be at the same distance from a star with the same mass as the black hole.
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Identical clocks at sea level on Earth and at the top of Mount Everest will show
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Faster passage of time on top of Mount Everest
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How do spectral lines produced in a massive star's atmosphere compare with the same lines measured in a terrestrial laboratory (ignoring any motion)?
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The spectral lines from the star are at a longer wavelength.
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Einstein's general relativity successfully explained
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The rate of precession of Mercury.
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When light from a distant object passes near the Sun,
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Its path is deflected
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Gravitational waves are produced by
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None of the above
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The existence of wormholes would imply
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The possibility of time travel
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Einstein showed that
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Space and time cannot be separated
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If you are in a spaceship that is accelerating, and don't look out
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- You can still feel that you are accelerating
- You will feel as if you have weight
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If you are in a spaceship that is sitting on the surface of a planet, you feel your weight. How does this compare to the weight you feel in an accelerating spacecraft?
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Both are the same; they are indistinguishable.
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If you follow the straightest possible path through a spacetime diagram,
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You are in free fall - you do not feel any weight or acceleration
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According to general relativity, the presence of matter curves spacetime and therefore
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Time slows down in a gravitational field.
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