Speed of light was determined 340 years ago today: Here are few important facts
The speed of light was discovered 340 years ago today, and Google has marked the occasion with a Doodle.
When it was discovered and who figured out the speed of the light?
Speed of the light was discovered in 1676 by a Danish astronomer called Ole Roemer. Notably, Roemer was not the first person, who tried to measure the speed of light. Galileo set about looking for it in the year 1638.
How did he determine the speed?
By monitoring the time difference, Roemer estimated light seems to take about 10 to 11 minutes to cross a distance equal to the half- diameter of Earth’s orbit around the sun. That means light travel at the speed of 200, 000, 000 metres per second.
What is the speed of light?
The speed of light is exactly 299,792, 458 metres per second and it travel 10 times faster than the sound. James Bradley came closer to this figure in year 1728 with the discovery of what is called the “aberration” of starlight and a speed of 295,000,000 metres per second for light.
The symbol of the speed of light is C and it is known for being a universal physical constant, which means that it is an exact quantifiable amount that doesn’t change.
Important Points to Remember
Theory of Relativity by Albert Einstein is important here, which underpins modern concepts of space and time. It says that the speed of light in a vacuum is always the same.
A light- year is the distance light can travel in a single year. It is about 9.5 trillion km.
Is it possible to go faster than the light?
Scientists in the year 2011 thought they had recorded particles which could travel faster than the light. But they were forced to admit that this was all a mistake that they did.