Lasers that are widely used today have been born. Today, the green laser pointer has become the basis of the Internet's optical fiber backbone network, which can help people find new and clean fusion energy sources, and lasers still seem futuristic. Laser means "expanded by stimulated emission". The full English name of the laser has fully expressed the main process of manufacturing the laser. In 1964, according to the proposal of Qian Xuesen, a famous scientist in China, the "light stimulated emission" was renamed "laser".
Laser is another major invention of mankind since the 20th century, following atomic energy, computers, and semiconductors. . Its brightness is about 10 billion times that of sunlight.
The principle of laser was discovered by the famous American physicist Einstein as early as 1917, but it was not until 1960 that the laser was successfully manufactured for the first time. Laser was born under the background of the urgent need of theoretical preparation and production practice. As soon as it came out, it achieved an extraordinary rapid development. The development of the laser pointer not only gave birth to the ancient optical science and optical technology, but also Lead to the emergence of an entire emerging industry. Lasers enable people to effectively use unprecedented advanced methods and means to obtain unprecedented benefits and results, thereby promoting the development of productivity.
It's very convenient when you want to highlight some laser pens on the slide. In order to stand out on the screen, the green laser pen is much better than the red laser pen. However, due to national or European safety regulations, it is more and more difficult to buy a green laser pen. In addition, on the one hand, it is a wireless mouse, on the other hand, it is a large laser pen, which is very inconvenient. Especially when the mouse clicks on unwanted behavior.