Physics: Concepts and Connections, 4th ed., Art Hobson Chapter 11

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Physics Concepts and Connections, 4th ed., Art
HobsonChapter 11 General Relativity
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What is special about dark matter?

• A) Its gravitational force pushes (or repels)
  instead of pulling
• B) It can move faster than c.
• C) It is made of a material that has never been
  observed in our laboratories.
• D) It exerts no gravitational force

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How do we know that dark energy exists?

• A) From gravitational lensing that bends light
  from distant luminous objects
• B) Light from distant galaxies is absorbed by
  something dark in the interstellar medium
• C) We have evidence that the universe is
  expanding at an accelerated rate

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?

• A)
• B)
• C)
• D)
• E)