2011 Nobel Prize in Physics goes to Cosmologists!

• "for the discovery of the accelerating expansion of the Universe through observations of distant supernovae"

Special Relativity

• principle of relativity
• the price: relativity of simultaneity
• Gedankenexperiment--light clock: animations here and here
• other consequences:
  length contraction
  time dilation
• relativity, mass, and energy
  nonrelativistic vs ultrarelativistic motions
• experimental tests