A common question from pupils is "How far can a laser pointer go?". A 1W blue laser can easily travel as far as 450 miles and can be useful in presentations. The beam can be directed at many different directions, and even towards vehicles moving. However, a powerful laser may radiate its beam so wide that it is unable to be observed from a vehicle. In such situations it is possible for a more powerful laser to be used.

The power of the laser beam from an object varies. A laser with a power of 200mW can be observed from one mile. A 1000mW red laser can be visible from ten miles away. Certain lasers have a smaller distance. According to ScienceDaily.com the world's longest laser is 270 kilometers long. It's important to know that a projectile or a "laser" in space will continue to radiate light till it hits something. The green laser, however, will only illuminate a small area of a room.

If you're concerned about safety, you might want to choose a laser pointer that is green. It looks as bright as an 100-watt light bulb when viewed from three feet away however it's nearly as bright as a quarter moon when looking upwards from 40,000 feet. The green laser pointer however, is not appropriate for green laser pointer use. You should always buy an authentic brand. If you're unsure then read the reviews and ask your friends and family whether they've experienced any issues using these devices.

Although laser pointers can go far distances however, their range is very only limited. They can be too powerful for the distance they be able to cover. You'll want to keep the laser in a closed housing to avoid spills that could happen. And while you're there, be sure to look over the capabilities for the range of laser. This is a great way to be safe and avoid a dangerous situation!

There are numerous methods of determining the distance a laser pointer can travel. Distance to moon 238 miles and it's possible to find one with a power of 5000mW. You can use a 50mW laser and it'll work at least as far as it's supposed to. A laser pointer with 5mW can be dangerous and distracting.

Laser pointers are designed to operate at a low power level. If you've got an optical source that has at a few thousand milliwatts, you can see it for up to one mile. If you're in aircraft, you could be difficult to spot the laser's pointer unless directed at your eyes. But if you're in the far reaches of the wilderness the beam of light from the laser pointer can be seen far away.