The velocity of light was first measured by:

The velocity of light was first measured by:

  • (A) Einstein
  • (B) Newton
  • (C) Ole Roemer
  • (D) Galileo
  • Danish astronomer Ole Rømer was the first person to make a real, number-based discovery on the speed of light, way back in 1676. Prior to Rømer, many scientists had held on to the notion that light was transmitted almost instantly.
  • Ole Rømer based his observation on his observation of the eclipses of Io, which is one of the moons of Jupiter. He noticed that the timing of these eclipses changed as the Earth approached Jupiter in orbit. Rømer understood that this was not related to the internal workings of the moon but was, in fact, related to the speed at which light was transmitted. Rømer calculated that light takes 22 minutes to travel through the diameter of the Earth’s orbit.
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Related MCQs:

 ‘NATO’ is an abbreviation of:

  • (A) North Atlantic Treaty Organization
  • (B) Non-Aligned Treaty Organization
  • (C) Non-Aligned Trading Organization
  • (D) North American Transport Organization

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