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LaserMan

5mW 650nm 2 in 1 Red Laser LED Flashlight Light Torch

 
( 9 Reviews)
 
US $2.99
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Product FAQs
  • What is the minimum power of laser pointer that could pop a balloon?
  • To pop balloons with a laser pointer, you would need a green laser pointer 95mW or above. A tip about popping balloons is to use only black colored balloons. If your balloon is not black, color the balloon with a black marker.
    Another trick is to use a magnifying glass to focus the laser pointer's beam. If you use a magnifying glass, you may get away with popping balloons with a 55mW to 75mW laser pointer.

  • How do I get the laser diode out of my laser pointer?
  • Most laser pointers have an LED in them. however, if you have a real one, what i would do is take a blunt object and push it through from the opening towards the back- something like a pen cap. the '3-prong' end are the leads, if you break them, its a real pain to resolder them back on.

  • How far does the laser from a laser pointer go?
  • People on the Moon would probably not be able to see your pointer. The beam from even the best lasers diverge somewhat so by the time light from a pointer reaches the distance of the Moon the intensity would be too low to be detected by eye. I'm sure there are some instruments that would be able to detect the light however.
    I suppose you could count the # of photons in a beam of light. Some astronomical instruments detect only a very few photons from far away objects. Since the energy of a photon is h x f where h is Plank's constant and f is the frequency and since lasers are nearly monochromatic--one frequency--we could measure the intensity of the laser and divide by the energy of each photon and 'calculate' the # of photons.

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