The speed of light – now you can clearly see it …

The speed of light is a basic physical concept, a fundamental constant. If you are connected to the Internet through an optical fiber, then the signal propagation speed in it is in the range from 68% to 72% of the speed of light in a vacuum.

The speed of light

The speed of light is so high that it is difficult or almost impossible to imagine. However, thanks to excellent video of Dr. James O’Donoghue and NASA we can visualize it.

The speed of light (in vacuum) is the absolute value of the speed of propagation of electromagnetic waves in a vacuum. At the moment, it is believed that the speed of light is 299 792 458 m/s or 1 079 252 848.8 km/h. Very often it is rounded up to 300 thousand kilometers per second.

In the video below, you see how a ray of light bends around the earth near its surface at the speed of light. In one second, light makes 7.5 revolutions around the earth. For one revolution around the earth, light takes 0.13 seconds.

According to modern physical theory, information or energy cannot be transmitted in space faster than at the speed of light.

A ray of light takes 1.3 seconds to fly from the Moon to the Earth and 500 seconds (8 minutes 20 seconds) to fly from the Sun to the Earth.

Thanks to the speed of light, you can talk on the phone with a caller on the other side of the earth. In Wi-Fi wireless technology, when transmitting electromagnetic waves through air, the speed of signal propagation is almost the same as the speed of light in vacuum.

Nothing in the world can move faster than the speed of light, and now you can visualize it yourself.

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