Amy Winehouse

These answers about the speed of light only cause more questions.?

Scientist say nothing can travel at the speed of light but light does. The simple explanation that travelling at the speed of light means it would increase to infinite mass must mean that light has no mass otherwise it would already be infinite in size. Does green laser light travel at the same speed as red laser light? Since these are related only by frequency does the doppler effect come into play?
Pardon my ignorance but I’m still confused. The science channel says that a light on a spaceship moving at say 0.5 x speed of light will still only move towards me at the speed of light and not 1.5 times the speed of light. So how can a red laser beam conform to the doppler theory. It seems that it would be impossible to accelerate a red laser on a spaceship towards me so that as it approached me it looked say green.

Is it possible to switch out a red laser diode for a blue one on a laser pointer?

i have a red laser pointer. and i have a blue diode.

i need a laser pointer that can pop a balloon?

please add a link so i can look at it and no more than 59.99

Green laser question – 5MW or 20MW?

Alright – I’m going to order a green laser from Amazon. I don’t want it to be powerful enough to cause eye damage of ANY kind (casual use laser), but I want the beam to be easily seen at night for at least 50 yards or so. I am looking at some green 5MW 532nm (what is nm?) and some 20 MW lasers. I don’t want it to burn or anything, so what so I choose?

<— LASER NOOB

how far can my laser pointer light stretch?

it is an energizer red laser pointer (the one with the pointer finer, arroww, ect.) it says max output<5mW, WAVELENGTH 650nm.
i dont care about air impuriteies, or how far a green laser pointer can go, please just tell me how far the beam can normally go, given the information provided

How far can my red $20 5mW laser pointer go?

please just aswer about the type of laser pointer i asked about, i dont care about air impurities, or green lasers, just how far mine mine will go in an average atmosphere.

How do I get above 10mw laser pointer in the USA?

I heard that above 10mw is seized by customs coming from China. Is there a way my friend in Canada can order it and ship it or drive it to me? Or is the only way to build my own?
-Thanks for the help guys

Help! I think i might have permanently injured one of my eyes!?

I just bought a 5mw 532nm powered green laser pointer today and soon as i got it i started playing with it on the walls and in the mirror. Needless to say on the mirror i shined it in my eye for a couple seconds right on the edge of where the color and the white part of the eye is because i thought it was cool it made the edge of my contacts look neon. Anyway i did this for about 5 seconds total and then i stopped and just put it up for awhile. after a couple minutes my eye started feeling just slightly different like there was very low pressure on it. i can still kind of feel it and its been about 2 hours now. So i googled my laser pointer power and realized that its actually very dangerous and now im scared i may have permanently injured my eye somehow. I know it was extreamely stupid on my part and i should have read up on it before playing around but if anyone can help me out it would be greatly appreciated.

Hazards of a 200mw green laser?

I don’t know the wavelength. I bought it for star gazing but I’m still concerned of how dangerous it is to the eye. I know about how dangerous it could be from direct eye contact but what about reflective & non-reflective surfaces? Should I consider goggles?

Is it legal to order or own a laser?

Is it legal to own a laser pointer with an output power greater than 5mW in the united states? Is It legal to order a laser pointer with an output power greater than 5mW? I was looking on several sites and they each are conflicting. on wicked lasers they say there lasers are 100% guaranteed legal while another website deal extreme says it isn’t legal to order lasers that are greater than 5mW. so Is it or isnt it legal to order a laser greater than 5mW in the united states