Lasers

Laser is a device that produces light. The beam is generated by a process called stimulated emission, and the term "laser" is an acronym for the term "optical amplification by stimulated emission radiation". The laser amplifies the light and generates a coherent beam. When the waves or photons of the beam are synchronized with each other, the beam is coherent. The laser is very strong, highly oriented, and color is very pure. Basic Principle Light is characterized by frequency, the number of peaks passing through a particular point in one second, and the wavelength.

The first laser device was a pulsed ruby ​​laser proved by Theodore Maiman in 1960. In the same year, the first gas laser (氖氖 laser) and the first laser diode were manufactured. Prior to this experiment, Arthur Schawlow, Charles Hard Townes, Nikolay Basov, and Alexander Prokhorov announced a groundbreaking theoretical study on laser function and the Towne team developed a microwave amplifier and oscillator in 1953 . Initially the term "optical laser" (MASER = amplified microwave amplification by radiation) was used, but later replaced by "laser".

These include DPSS lasers, flash lasers, fiber lasers and microlaser / microchip lasers. Also,

Laser is a device that emits a strong beam of strong electromagnetic radiation (light). The term laser is derived from the acronym "optical amplification by stimulated emission of radiation". The laser beam has the special properties of coherent, usually wavelength or color, that the emitted light waves are synchronized with each other. There are various types of lasers that generate infrared rays, from gigantic devices that emit powerful high-energy radiation pulses (such as X-rays) to small devices etched into semiconductor chips.

Laser is an acronym for optical amplification of stimulated emission radiation. Thus, by definition, the laser emits electromagnetic radiation. Obviously, there is a way to generate a coherent electron beam, but you do not call it a laser. There are types of free electron lasers, but it uses electrons to generate electromagnetic radiation instead of coherent electron beams. I have read about expanding time, and I am interested in this subject. In fact, the clock on the International Space Station and another clock on the earth show that there is a slight time lag. However, I do not think that the spacecraft will fly over the Earth and return to the future Earth, as soon as it flew the speed of light and return immediately. This seems to be illogical