Which of the following famous scientists measured the speed of light?

Options :
  1. Romer
  2. Newton
  3. Galileo
  4. Einstein
Answer and Explanation :-

Answer: Option 1


Ole Rømer, a Danish astronomer, calculated the speed of light by observing the eclipses of Jupiter's moon during the years 1668-1674. A discrepancy was observed for the time between the eclipses, increasing when the Earth was moving away from Jupiter and decreasing when the Earth was approaching. In half a year, there are a total of 102 eclipses of Io (Io is the innermost of the four moons of Jupiter discovered by Galileo in January 1610), giving a maximum delay of 16.5 minutes. Rømer interpreted this as the difference in the times needed for the light to travel between Jupiter and Earth. He obtained a value of 214,000 km/s compared to the current value 299,792 km/s. The diameter of the Earth's orbit was not accurately known then and there was also an error in the measurement of the delay. Nevertheless, it was a first confirmation that the speed of light is finite.

How do you rate this queston?  Very Easy  Easy  Average  Above Average  Tough

Previous Question : Among the following types of sugar, which one is the sweetest sugar of all?

Next Question : Which of the following terms is used to describe the property of a substance to absorb moisture from...

Click here for online test on General Science


 (Getemail alerts when others member replies)

Some things take so longBut how do I explainWhen not too many peopleCan see we're all the sameAnd because of all their tearsYour eyes can't hope to seeThe beauty that surrounds themNow, isn't it a pity
-George Harrison