Today's video

Laser with Tim&Moby


How do you make a laser? The word laser stands for Light Amplification by Stimulated Emission of Radiation. In modern days, you can find laser used everywhere.
A laser beam is a powerful beam of coherent light. In that phrase, it means that the light is traveling all in one direction. A laser light is created from a lasing medium, it can be solid, liquid, or even gas like. The atoms in the lasing medium is made into a excited form by two power cords, like electricity. After the atoms absorbed enough energy, the will have to release it in a photon, a single unit of energy. When an photon is released, it will bump into other atoms, causing them to also release another photon of the same pattern. Mirrors at both ends of the laser bounce the photons back and forth, back and forth. And then, you got a huge amount of coherent light inside the laser. One of the mirrors is only half silver, and that allows a hard, solid stream of light to pass through. And that is why a laser light is so special.
A light bulb sends different waves of light in all directions. Those lights, which we see as color, combine together to make a giant mass of white. Laser light is only one color, and always focused. They can be used for a lot, like playing music to communication to measuring distances and even to delicate medical procedures. Some lasers are even hot enough to cut through metal!Lasers are also used for a lot of thing you couldn't imagine! You can use them to make holograms. Doctors use lasers to treat eye problems by dong a thing called LASIK, grocery stores use them to scan bar codes, and you can even get to scare a cat! Because lasers are so cheap these days.
Lasers are sure fun to study. Check out Moby with a light saber!