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Normal (non-coherent) light IS visible in air, just not too noticeably. If something is "visible" then that means specifically that "visible light" (aka light in the visible spectrm) is reaching your eyes. Lasers are only special because instead of being many wavelengths of light, they only emit one wavelength of light. And if that particular wavelength is not in your area then you will see that one more than others. Notice that a laser "tints" the wall red. If you put a red laser on a blue wall then you will see purple dot; etc..
That's why you see the sunset when the sun is no longer in view, the light being scattered by the air and the particles in the air. It's also why the sky is blue, with blue light being scattered by the atmosphere more than the red.
But that aside, a low power red laser is not very visible in the air since the longer wavelength of the red light doesn't scatter well off the air molecules. Larger dust or smoke particles in the air can reflect the low power red laser and you see the twinkling effect as the beam hits the individual particles.
On the other hand, a the shorter wavelength of a blue-green laser scatters off the air molecules more effectively, so you can see the photons scattering off from the beam.
A very high power laser in air is another story. It has sufficient energy to ionize the air within the beam (like a lightning channel) and this ionized air glows with its own emitted light.
What else can I help you with?
Can sunlight pass through laser beam?
Yes, sunlight can pass through a laser beam as they are both forms of electromagnetic radiation. However, the laser beam may appear as a visible beam when sunlight is passing through it due to scattering and reflection effects.
Can a lasar beam go through anything?
A laser beam can typically go through transparent materials like glass or water, but it can be absorbed or reflected by opaque surfaces like metal or wood. The ability of a laser beam to pass through a material depends on factors such as the wavelength of the laser, the properties of the material, and the intensity of the beam.
What is the name of the component that deflects laser beam?
A mirror or a prism can be used to deflect a laser beam. Mirrors reflect the beam at an angle, while prisms can refract and redirect the beam in a different direction.
What do you call a beam of light so powerful that it can cut through light?
A laser. Laser beams are intense and concentrated beams of light that have the ability to cut through various materials, including other light sources.
Who do you bend the beam of a laser with sound?
You can bend the beam of a laser with sound using a technique called acousto-optic modulation. This involves passing the laser beam through a medium that is being vibrated at the frequency of the sound wave. The sound wave changes the refractive index of the medium, causing the laser beam to bend.
Can sunlight pass through laser beam?
Yes, sunlight can pass through a laser beam as they are both forms of electromagnetic radiation. However, the laser beam may appear as a visible beam when sunlight is passing through it due to scattering and reflection effects.
Can a lasar beam go through anything?
A laser beam can typically go through transparent materials like glass or water, but it can be absorbed or reflected by opaque surfaces like metal or wood. The ability of a laser beam to pass through a material depends on factors such as the wavelength of the laser, the properties of the material, and the intensity of the beam.
What is the name of the component that deflects laser beam?
A mirror or a prism can be used to deflect a laser beam. Mirrors reflect the beam at an angle, while prisms can refract and redirect the beam in a different direction.
How does the laser works?
The laser works by reflecting and amplifying a beam of light through a tube of mirrors.
What do you call a beam of light so powerful that it can cut through light?
A laser. Laser beams are intense and concentrated beams of light that have the ability to cut through various materials, including other light sources.
How can you get laser?
How can yo u get laser beam?What is laser beam characteristics and principles?
Who do you bend the beam of a laser with sound?
You can bend the beam of a laser with sound using a technique called acousto-optic modulation. This involves passing the laser beam through a medium that is being vibrated at the frequency of the sound wave. The sound wave changes the refractive index of the medium, causing the laser beam to bend.
What is the narrow beam of light?
A laser beam (which is shot through a ruby or gas to make it so fine)
What is the name for a beam of light which can cut through metal?
A laser beam is a focused beam of light that can be used to cut through metal due to its high intensity and precision.
What can you use to split a laser beam?
The most common method is through the use of a beam splitter. This employs -- to keep it simple -- a partially transparent mirror placed at a 45 degree angle relative to the laser beam. Some of the beam passes through the mirror, and the rest is reflected perpendicular to the original beam by the mirror.
What happens to a laser beam when a window vibrates?
If a window vibrates, it can cause the laser beam passing through it to scatter or diffract due to the changing shape of the window. This can result in a less focused or distorted beam exiting the window. The degree of impact on the laser beam will depend on the amplitude and frequency of the vibration.
In a laser printer the laser beam is initiated and directed toward the octagonal mirror called the mirror?
The laser beam in a laser printer is initiated from a laser diode, not a mirror. The laser beam is then directed by a rotating polygon mirror, not an octagonal mirror, which reflects the beam onto the drum surface to create the print image through a process called electrostatic printing.
