special relativity

• speed of light in a vacuum is the same for all observers
• measurements of space and time for a moving and stationary observer are different
• length contraction-

  • only noticeable at speed close to lights velocity
  • length measured by stationary observer is shorter than in the rest frame of reference
• time dilation-

  • only noticeable at speeds close to light speed
  • time measured by stationary observer is greater than time measured by moving observer