The beam must be of a wavelength that is visible to humans, and fog or dust scatters the light very strongly so that you can see it. However, even in pure, clean air, you will be able to see a laser beam under certain conditions. This is because light can scatter from air molecules themselves via Rayleigh scattering.

Yes if it’s a laser of visible light; it’ll reflect the laser all around and so you can see the light. If it’s an IR laser, though, it’s invisible to the human eye regardless.

Along the path of a laser, the photons are all traveling straight toward that end point, in the same direction. None of the photons present along its path are directed toward your eye, so you cannot see the laser beam as it travels.

It’s the dust particles or mist droplets which reflect the light of the laser. When you see a laser beam, what you are really seeing is the beam being scattered by various small particles suspended in the air.

Laser light shows cannot be viewed in the daytime generally. Under stadium lights the light show might be viewable but it would be too dim to be impressive. Laser light shows are almost always augmented with fog or a fine mist of water.

Best Hand Held Laser Pointers For Daytime Use

• Green at 532nm is the brightest color to the human eye – you’ll want to go with a green beam when it comes to daytime visibility.
• 200mW is a starting point – for real daytime use the higher the mW power the better visibility you will get.

Visible-light lasers, with a dot or beam that you can see, will be blocked by walls or other light-blocking material.

As a general rule, green lasers are 532nm are 5-7X brighter than any other laser color, at the same power. Whether blue, red, purple/violet, or a light color like yellow, green is the best at strength for visibility.

Green is more easily perceived by the eye and the beam is visible along its path. But green lasers are also more dangerous. Green is more easily absorbed by the retina than red, so it requires less exposure to cause damage.

Laser light shows are usually coordinated with air traffic control and the military to ensure controlled airspace. The answer is, no, it is not legal to point a laser in the sky indiscriminately.

The typical red laser pointer is about 5 milliwatts, and a good one has a tight enough beam to actually hit the Moon—though it’d be spread out over a large fraction of the surface when it got there. The atmosphere would distort the beam a bit, and absorb some of it, but most of the light would make it.

World’s most powerful laser developed by Thales and ELI-NP achieves record power level of 10 PW

• The Thales system has generated its first pulses at a world record power level of 10 petawatts.
• ELI-NP now has the world’s most powerful laser system.

A powerful enough laser could cut through the retina and burn through the person’s brain tissue. However, it would take a while, and you’d have to focus the laser on a specific point. So basically, you’d have to strap the person down or immobilize them in some fashion.

Cut diamonds are designed to exaggerate the crystal’s reflective surfaces, making it appear bright and glittering. To do this, the rock is cut precisely using a laser. Lasers are effective for cutting all sorts of materials but are particularly useful for cutting diamonds.

Some lasers emit radiation in the form of light. Others emit radiation that is invisible to the eye, such as ultraviolet or infrared radiation. In general, laser radiation is not in itself harmful, and behaves much like ordinary light in its interaction with the body.

The US Army is building a laser weapon more than a million times more powerful than any used before – although because it delivers short pulses, the overall energy involved is low.

Serious disability is equivalent to visual acuity of less than 20/200 vision. Laser weapons which are designed, as their sole combat function or as one of their combat functions, to cause permanent blindness or to diminish vision (i.e. to the naked eye or to the eye with corrective eyesight devices) are prohibited.

Airplanes With Lasers Won’t Be Shooting Down Ballistic Missiles Anytime Soon. For now, the action in airborne lasers appears limited to the Air Force Research Laboratory’s …

The Indian and US satellites are vulnerable to China’s ground-based lasers as according to some analysts China has acquired the full capability to destroy the enemy’s satellite sensors through its lasers. China can cause great damage to Indian and US satellites during wartime.

Top 10 Countries with Most advanced weapons in the World

• Turkey. Turkey is one such country that has robots to help battle it out during the wars.
• South Korea.
• Italy.
• Israel.
• France.
• India.
• Russia.
• United Kingdom.

US is not alone in working to perfecting laser weapons. Russia, UK, China and other countries also have similar programs. Russian Deputy Defense Minister Yuri Borisov has also revealed that the Russian military has commissioned several types of laser weaponry.

China is making progress with its ground-based directed energy weapons that could potentially be used to take down satellites, according to analysts. The Secure World Foundation recently released a study, “Global Counterspace Capabilities: An Open Source Assessment,” which looked at Beijing’s efforts.