A common question from pupils is "How far is a laser-pointer's range?". A 1W blue laser could easily reach up to 450 miles and can be useful in presentations. The beam is able to be directed in a variety of directions, including at moving vehicles. However, a laser with a high power can extend its beam to the point that it would be unable to be seen from a vehicle. In these situations it is possible for a more powerful laser to be employed.

The power of lasers in an object varies. A 200mW green laser can be observed from an entire mile. A 1000mW red laser could be seen from 10 miles away. Some lasers have a shorter range. According to ScienceDaily.com, the world's longest laser measures 270 kilometers. It's important to know that a projectile or "laser" within space will continue to radiate light till it strikes something. A green laser however will only illuminate a small area across a room.

If you're concerned about security, you may prefer an green laser pointer. It looks as bright as a 100-watt light bulb at three feet, however, it's brighter than a quarter moon when looking up from the distance of 40,000 feet. Laser pointers that are green, on the other hand isn't safe to use. Always choose a reputable brand. If you're unsure then read the reviews and ask family and friends about any incidents they've experienced using these devices.

Although laser pointers can go for a long distance but their range is limited. This is due to the fact that they may be too powerful in relation to the distance they reach. You'll want to keep them in a sealed housing to stop accidental spills. And while you're there, make sure to verify the range that the laser can reach. This is a great way to protect yourself and avoid a dangerous situation!

There are a variety of methods to calculate the distance that a laser pointer can travel. Distance to moon 238 miles and it's possible to find one with a power of 5000mW. It's possible to use an flint laser of 50mW and be able to work as far as it's intended to. Using a 5mW laser pointer could be risky and distracting.

Laser pointers are intended to function at a low power level. If you have a laser that is a few thousand milliwatts, you can see it for as long as a mile. If you're in the air, it could be impossible to observe the laser pointer unless it's directed at your eyes. If you're in the far reaches of the wilderness, the light from the laser pointer could be seen far away.