Any light beam will go on forever, though it will become attenuated, if not absorbed by intervening matter.
200 miles
A 200 mw laser should be able to hit a person from over 100 miles. That is of course if it has full battery
A standard green laser pointer has a power of between 4 and 20 milliwatts. A red laser, for comparison, has a power of less than 5 milliwatts. The beam of a green laser can often be seen, while the beam of a red laser cannot be seen.
You cannot purchase new green laser pointers for $10. Most of the green laser pointers for go around $30.
As far as your eyes can see...
10 ft
Yes! You could really go blind from looking to long at a green laser.
do you mean how far does the light go? red lasers can reach up to 10ft (at least as far as I've seen). at 5mw green lasers can range from (3000ft - 5000ft and still see beam clearly). at 5mw
about 2 metres love
Some can travel over 25 miles.
There are several places where you can purchase a green laser pointer, the best place to purchase a green laser pointer would be through eBay or Maplin Electronics, these websites offer 6 in 1 green laser pointers for competitive prices.
You need to get your robot dog to touch the green thing.In order to do it, first, look at the laser's patterens. Then, when the first one is down, go. the laser will move up... and the second laser will go down. Keep following that patteren until you reach green point.