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How powerful is a 500mw lazer?

sprotz

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Jun 2, 2019
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I am trying to figure out what power of lazer pointer to buy, but I wanted to ask, can a 500mw lazer burn at 30m distance and is the beam dangerous at this distance? Also, is the beam visible outside during day and is it safe to look at without safety goggles?
 



steve001

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I am trying to figure out what power of lazer pointer to buy, but I wanted to ask, can a 500mw lazer burn at 30m distance and is the beam dangerous at this distance? Also, is the beam visible outside during day and is it safe to look at without safety goggles?
In the order of questions you asked.
I hear they can bench press at least 1000 pounds.
Yes with proper optics
Yes
Absolutely not
No or yes depending upon what the actual question is you're asking
 

paul1598419

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A 500 mW laser is not a particularly good burning power. If you wish to light brown paper on fire you will need a 1.5 to 2 watt laser. To ignite wood it needs to be even more. You can pop black balloons, light matches and cut black electrical tape with a 500 mW laser.

In order to burn at 30 meters you will need a beam expander on top of a more powerful laser. That is because the multi-mode diodes used tend to diverge quite quickly.
 

Encap

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What 500mW laser from where? What wavelength? Generalities about imaginary things are meaningless.

500mW is more than enough to cause serious irreversible ocular damage.
5mW is the upper limit in USA of legal import and so called eye safe lasers.
Even those can cause eye damage if used improperly.

Study this web site and learn about safe laser use: https://www.laserpointersafety.com/
 




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