Most people have heard the laser word, but they do not know what laser really is. What is the difference between ordinary light and laser and what is a stand-alone laser?
Most people have heard the laser word, but they do not know what laser really is. What is the difference between ordinary light and laser and what is a stand-alone laser? It’s better to start with the last question.
The laser stands for a phrase, which at the beginning of each word forms a laser word. The full name of the laser is “Light Amplification by Stimulated Emission of Radiation“. But this concept seems a little weird and unfamiliar, let’s get into the laser itself.
Almost everyone knows that the police use lasers to measure the speed of cars. At least those drivers who exceed the speed limit recognize this. But how many people know if you use lasers several times during a normal day? Lasers are found in cd players and laser printers and many more.
You’ve seen most of the laser in action movies. Where the hero of the story should escape laser beams when solving dangerous problems. Laser power is both amazing and scary.
What is laser difference with other li
ghts?
Light is an electromagnetic wave. Each wave has brightness and color, and it fluctuates at a certain angle, which is called polarization. This is also true for lasers. But laser beam beams are more parallel than any other light source. All parts of the beam (roughly) are in a particular direction and thus the beam is diverted or bent too little. With a good laser, you can light the object at a distance of one kilometer with a point at a radius of about 60 mm.
Since laser light is completely parallel, it can also be concentrated in very small thicknesses, and at the focus of the light the energy is so large that you can cut or carve with them. This property can also be used to turn on and see the finer details. This property is used in surgical instruments and CD players.
Meanwhile, laser light can be monochrome. It means that it has only one wavelength. White light consists of all spectral light, but light colors like the red light diode include a continuous spectrum of red wavelengths.
On the other hand, laser emissions are often not very powerful when converted to energy. A strong type of laser used in theater lasers, its light is no longer than a streetlight. Their only difference is with ordinary light in the parallel of two sources.
Induced emission
Atoms and molecules naturally emit light at times and directions and random phases. All the light produced from ordinary light sources, such as lamps, candles, neon lights, and even the sun, are created in this way.If energy is stored at the atoms and an optical wavelength is reached near its proper wavelength, nothing else happens. An atom of light emits a light that runs perfectly in parallel with that light.
Usually, atoms and molecules of light emit light that has the following two conditions:
* Save energy due to heat or energy.
* It’s been a while since they were saved.
The light emitted in this way is in random order (random), with phases and random times.
* Energy stored at the atom (as before)
* Before it’s too late, the light is close enough to the atom, so the light is randomly diverted as described above.
* Transient light has an appropriate wavelength of the atom.
The process here is called inductive emission, which, with feedback, intensifies within a mirror cavity and provides laser conditions.