WONDER #1220: How Fast Is the Speed of Light?

Question 1 of 3

Who was the first scientist to show that light moved at a finite speed rather than instantaneously?

  1. Albert Einstein
  2. Carl Sagan
  3. Ole Rømer
  4. Isaac Newton

Question 2 of 3

Light travels at about how many miles per hour?

  1. 671 million
  2. 186,000
  3. 299,792,458
  4. 55

Question 3 of 3

The speed of light is an important mathematical constant that forms the basis of what astronomical unit of time and distance?

  1. meter
  2. miles per hour
  3. foot
  4. light-year

Check your answers online at https://www.wonderopolis.org/wonder/how-fast-is-the-speed-of-light.