Video: How does light move when they take portrait photos?

We talk a lot about light in photography, which is an important factor in creating a beautiful picture. But how light moves, few people know it because ordinary users don't have devices fast enough to record light. However, physicists from many US universities gathered in Stanford's lab and succeeded in recording how light traveled.

By using a laser lamp to take portraits in a dark room, the team recorded many very intuitive videos below:

The speed of light is 299,792,458 meters per second.

In terms of physics, we see everything in the environment thanks to the light emitted from the light source, moving to the object and from the object reflected back into our eyes. The speed of light is 299,792,458 meters per second. In astronomy, you can easily visualize light because of the distance between planets, stars far away.

More specifically, light costs 8 minutes and 20 seconds to move from the earth to the sun but only costs 0.000 000 003 seconds to move 1m. It is because of this fast speed that we cannot see the movement of light.

Light is electromagnetic radiation and the definition of light is often used to refer to visible radiation (wavelengths range from 380nm to 700nm). Like all electromagnetic radiation, light can be described as waves of moving particles called photons. (according to Wikipedia).