Blue laser pointer with 405 nm light. Although there is little preference for green and red, what it can be used for also reflects a person's unique aesthetic taste. It may not be as popular as astronomy lasers, because brighter colors make objects more visible in the sky. However, it comes down to all other uses, like pinpointing something on a big screen or a blackboard. Green laser pointers are the most popular high power laser pointer in the world now, because green lasers are 6 times more expensive than red lasers and much cheaper than blue and yellow ones. The green pen is the light-emitting wavelength of 500-550nm, and the wavelength sensitivity coefficient table is the closest wavelength. Green lasers are highly efficient light sources that are easier for the eyes to recognize.
Sensitivity of the human eye to the laser pointer
The human eye is more sensitive to green light than much red light; otherwise, green light scatters the atmosphere more than red light. Red laser pointer, wavelength 630 - 670nm Green laser pointer is longer. The first red lasers were released in the early 1980s. Today, more durable red light transmits air, dust, and water vapor, so more power can be seen in the light path. The first reason that comes to mind is the wow factor associated with lasers. But it's not just the imaginations of exciting scientists and enthusiasts. Such a powerful S laser simply means we have to reconstruct extreme environments found in space, such as in stellar atmospheres - including our sun - or in the cores of giant planets such as Jupiter. When these powerful lasers are fired at ordinary matter, it instantly vaporizes, creating an extremely hot and dense ionized gas that scientists call plasma.
This extreme state of matter is extremely rare on Earth, but common in space—almost 99 percent of ordinary matter in the universe is thought to be in a plasma state. Ultra-intense green laser pointer allow the United States to create small replicas of these extreme states and objects from the universe, which can be studied in a controlled manner in the laboratory. In a way, they allow America to go back in time because they can recreate the conditions found in the early universe in the moments after the Big Bang. These extremely dense and hot environments that only ultra-powerful lasers can create have taught us a lot about the evolution of our universe and its current state.