Nowadays, many people are particularly curious about laser pointers. How far can the red laser pointer shine? Laser pointers are particularly fascinating for many elementary and middle school students because of their luminous effect and the far-reaching exposure. However, the quality of laser pointers sold in stationery stores around the campus varies in quality. Moreover, many laser pointers have extremely large wattages. I bought a red laser pointer with higher power, which is also very dangerous. How far can the red laser pointer be illuminated? It is related to many practical phenomena. Generally speaking, the greater the power, the farther it can be illuminated.
The greater the power, the farther the irradiation. The air quality is good, the fewer particles, the smaller the beam attenuation, and the farther the beam is shot. The smaller the beam divergence, the farther the beam is shot. The power of the laser pointer is about 10 milliwatts, which can irradiate about 3 kilometers. If it is a red laser pointer with a power of 200mW, about 10 kilometers should be no problem.
Many people just use laser pointers as toys to play, but they don't understand the eye damage of such toys. Schools must vigorously promote campus safety knowledge to let people understand the dangers of laser pointers. How harmful is the toy laser pointer? The laser pointer power of more than 3-5 milliwatts will generally cause damage to the eyes and skin of the human body. If it is a higher power laser pointer, the harm will be greater. Don't buy inferior laser pointers at will. If you miss it, it will easily cause damage to your eyes or skin, which will seriously affect your health.
Use of laser pointer
The green laser pointer is different from the ordinary red green laser pointer. Its output brightness is much higher than that of the red laser pointer, which is dozens of times or more than the brightness of the general red laser pointer. Point the green laser pointer to the sky at night, and you can see a bright green light piercing the night sky. Astronomers can use it to point to the stars, also known as "pointing star pen".
Applicable to: Guiding guides for museums, various exhibition venues, and outings. A guide tool for climbers and mountain dwellers in the mountains. A powerful tool for briefings and meetings. The best indicator for inspecting construction sites. Medical teaching (X-ray teaching).