Whether it will be realized in eternity depends on the existence of our entire universe. It depends on the intensity and quality (alignment of the green laser pointer), but it is possible. In fact, one experiment was to irradiate a target on the moon with a laser. Compared with the rest of the light from the…
Day: June 12, 2021
Coherence keeps the laser pointer beam focused at a distance
Why is the laser beam so thin? There is no absolute reason to say that they must be thin. The “green laser pointer” is only light amplified by stimulated radiation, so if you prepare some optical gain medium in its excited state and put in some “seed” light of the correct frequency, it will be…
I am looking at how to use the thin laser pointer beam
I’m not entirely sure what you mean is that thick and wide are two different things. My view on the product described in her link is a device that uses an IR green laser pointer diode as an illumination source, and uses an adjustable zoom lens type device to spread the light from the laser source to…
Provides very obvious clues about the whereabouts of the laser pointer lamp
In this regard, the light pen under consideration can be a green laser pointer or a disposable flashlight, with the same effect. A beam of light that is reasonably focused and collimated, which means that light that reasonably maintains its shape and size within an important distance is invisible for all purposes. Of course, unless you put…
A more powerful laser will produce a brighter scattered beam
If you see a point or a beam, you have a visible laser. Whether you see a light beam in the air depends on several factors: In clear air, the light beam will be scattered by air molecules in a process called Rayleigh scattering. The process is fairly weak and depends on atmospheric pressure, green laser…
The green laser pointer still has a relatively safe power level
If you mean under “normal” conditions, that is, there is not much dust in the air, and the humidity is within the normal range, then it largely depends on the wavelength. The shorter wavelengths are more dispersed in the air molecules (the presence of gas) than the longer wavelengths. Dispersion is the cause of the…
Never point the laser pointer can be in the eyes
How much power does the laser pointer need to emit a visible beam? This is not a question of power, which is equal to the intensity of the laser. A more powerful green laser pointer will make the spot farther and brighter. The laser line used in the building is a spot of light “diffused” through a…
You need to know that a laser pointer is a focused light
It may end with a star, as if it is widely exaggerated to think that space spans infinity, which may be true, but in our case, think of space as a collection of celestial bodies and gaps in between. So at some point, there must be a star in the green laser pointer path. If the star…
Your laser pointer beam can go into space
Laser is a high-energy coherent and extremely concentrated focused electromagnetic wave. But it will eventually pay remotely. I am not a green laser pointer expert by any means, but I think one of the reasons is that the beam itself consists of multiple wavelengths. There are countless wavelength starting points between any two consecutive peaks in the…
The divergence of the laser pointer beam is usually much smaller than other light sources
We must first determine what we mean by the problem. Because light will not stop spreading. The more interesting question is how far we can see the reflection of the laser under ideal conditions. In complete darkness, when it shines on a white surface, we can see a <5mW 650nm laser from 500-1 km away….