00:00299-792-458 meters per second.
00:04That is the speed of light, and it is the absolute speed limit of our universe.
00:10Nothing with mass can reach it.
00:12The closer you get to it, the more the universe fights back.
00:15Time slows down, mass increases, and the energy required becomes infinite.
00:21Today we explore why this limit exists, what happens when you approach it,
00:26and what the Quran says about something that once traveled faster than light itself.
00:33299-792-458 meters per second.
00:37That is the speed of light, and it is the absolute speed limit of our universe.
00:42Nothing with mass can reach it.
00:44The closer you get to it, the more the universe fights back.
00:48Time slows down, mass increases, and the energy required becomes infinite.
00:53Today we explore why this limit exists, what happens when you approach it,
00:59and what the Quran says about something that once traveled faster than light itself.
01:06299-792-458 meters per second.
01:10That is the speed of light, and it is the absolute speed limit of our universe.
01:15Nothing with mass can reach it.
01:17The closer you get to it, the more the universe fights back.
01:21Time slows down, mass increases, and the energy required becomes infinite.
01:27Today we explore why this limit exists, what happens when you approach it,
01:32and what the Quran says about something that once traveled faster than light itself.
01:36Light travels at 299-792-458 meters per second in a vacuum.
01:44That is approximately 300,000 kilometers every second.
01:49In one second, light travels seven and a half times around the entire earth.
01:54But the truly remarkable thing about the speed of light is not how fast it is.
01:59It is that it is constant.
02:01No matter how fast you are moving toward or away from a light source,
02:06you will always measure light at exactly the same speed.
02:10This was the result that baffled physicists,
02:13and eventually led Albert Einstein to develop his special theory of relativity in 1905.
02:21Einstein's relativity tells us that as an object with mass approaches the speed of light,
02:27three things happen.
02:28First, time dilation.
02:32Time slows down for the moving object.
02:35If you traveled at 99%, the speed of light for one year, seven years, would pass on earth.
02:41Second, length contraction.
02:44Space itself compresses in the direction of travel.
02:48Third, relativistic mass increase.
02:51The object becomes heavier, requiring more energy.
02:54To reach light speed would need infinite energy.
02:59It's a mathematical impossibility.
03:02These effects are measured daily.
03:05GPS satellites move fast enough that their clocks tick differently.
03:09Without relativistic corrections, GPS would be kilometers off.
03:14Your phone's navigation works because we account for Einstein's equations.
03:18The strict rule is, nothing with mass can reach light speed.
03:24But physics has exceptions.
03:27Space itself isn't bound by it.
03:30During cosmic inflation, just after the Big Bang,
03:34regions of space separated faster than light.
03:37Space was expanding, not moving.
03:40What does Islam say?
03:42While the Quran doesn't mention the speed of light explicitly,
03:46it describes the angel Jabril's ascension to the highest heaven in a moment.
03:50A journey that, in our physical terms,
03:54would require a speed faster than light itself.
04:02Toonet.
04:03Toonet.
04:04Toonet.
04:05Toonet.
04:06Toonet.
04:07Toonet.
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