Laser has been widely used in our life. Supermarket cashiers use them to scan bar codes on products, and professors use them to get students' attention. Cat owners use the red Dot as a toy for their pets, arguably the most popular use for laser Pointers. Compared with other types of laser Pointers, it is cheaper to produce laser Pointers that emit red light. Other colored laser Pointers are not unknown, but the red one is still the most economical option. As a result, they are the first choice for mass production and the most popular item on the shelves.
The difference between red and green laser Pointers
Laser pointer Red and green are two very useful tools that can be used as Pointers. As for which of the two is better, there is no absolute rule, and it is up to individual needs to judge. In general, people are used to using green laser Pointers for e-learning, demonstrations, and presentations. The effect of green is most obvious in RGB of laser source. It has a longer range and is more effective than other colors of the same power. It's perfect for outdoor use. Note that no matter the laser pointer is red, green or other colors, it must be used carefully. It cannot be used to illuminate the human body, otherwise it may cause harm to the human body. Green light is brighter than red light for two reasons :1. Green light is brighter than red light. The most intuitive level of perception; Human eyes are about eight times more sensitive to green wavelengths (532nm) than red wavelengths (650nm); Visually, green light is 10 times stronger than red light. 2. The shorter the wavelength, the greater the energy.