Universe: Stars And Galaxies
6th Edition
ISBN: 9781319115098
Author: Roger Freedman, Robert Geller, William J. Kaufmann
Publisher: W. H. Freeman
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Chapter 21, Problem 31Q
To determine
The reason of
The circumstances in which the Newton’s description about gravitation is adequate.
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The great proof of Einstein's Theory of General Relativity was that light is bent by gravity (as it travels through a curved
spacetime). Which of these statements is true??
O A light ray is bent the same amount, it doesn't matter how strong the gravity is.
O A light ray is bent less by an intense gravitational field.
O A light ray is bent more by an intense gravitational field.
O Light rays aren't bent.
The special theory of relativity is "special" because it deals only with a certain type of reference frames, inertial reference frames. What are inertial reference frames?
What are the two postulates of Einstein's special theory of relativity?
Chapter 21 Solutions
Universe: Stars And Galaxies
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- With regard to reference frames, how does general relativity differ from special relativity?arrow_forwardWhich of the following statements are fundamental postulates of the special theory of relativity? More than one statement may be correct. (a) Light moves through a substance called the ether. (b) The speed of light depends on the inertial reference frame in which it is measured. (c) The laws of physics depend on the inertial reference frame in which they are used. (d) The laws of physics are the same in all inertial reference frames. (e) The speed of light is independent of the inertial reference frame in which it is measured.arrow_forwardWhich of the following statements are fundamental postulates of the special theory of relativity? More than one statement may be correct. (a) Light moves through a substance called the ether. (b) The speed of light depends on the inertial reference frame in which it is measured. (c) The laws of physics depend on the inertial reference frame in which they are used. (d) The laws of physics are the same in all inertial reference frames. (e) The speed of light is independent of the inertial reference frame in which it is measured.arrow_forward
- The special theory of relativity has what effect on measurements done today? (a) None whatsoever, because any correction would be negligible. (b) We need to consider the effects of relativity when objects move close to the speed of light. (c) We should always make a correction for relativity because Newton’s laws are basically wrong. (d) It doesn’t matter, because we can’t make measurements where relativity would matter.arrow_forwardDo binary stars (double-star systems that orbit about a common center of mass) radiate gravitational waves? Why or why not?arrow_forwardWhy do scientists consider Einstein's General Theory of Relativity to be a better theory of gravity than Newton's theory of gravity? a) Newton's theory was never useful, so it had to be replaced by something. b) The two theories always make very different predictions, and only Einstein's theory works. c) Einstein's gravity makes correct predictions in a few cases where Newton's theory does not. d) Einstein's theory is newer, and scientists always prefer newer theories.arrow_forward
- Consider that GPS satellites circle the Earth at an altitude of about 20,200 km above the surface of the Earth. Due to special relativity, if the clock on board the GPS satellite measures 24 hours (1 Earth day), how much more (or less) time will elapse as measured by a clock "at rest" on the Earth? Give your answer in micro-seconds, us (where 106 us = 1 s). Hint: you are asked for the time *difference* between the two observers.arrow_forwardYou take a round trip to the star Sirius, a distance of 8.6 light years away, on board a spacecraft traveling at 99% the speed of light. When you return to Earth, 17.2 years have elapsed on Earth. But due to Einstein's theory of relativity, you will have aged by 172 years 24 years 2.4 years 17.2 years The fastest space probe currently flying (perhaps one of the Voyagers) might be able to reach a nearby star system in about 50,000 years 5,000 years 50 years 500 years Elon Musk of Space-X plans to send a human crew to the nearby Proxima Centauri star system by 2050. True Falsearrow_forwardneed help with thisarrow_forward
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