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Onlinegopher
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Laser pointer strengths * 1
    #26704586 - 05/29/20 01:01 PM (3 years, 7 months ago)

Whats the smallets mW laser pointer you need to point at the stars, I used to have one 10 years ago, I think it was a green 20 mW pointer, but thats kinda a guess, I forget

Im looking at pointers on fasttech and im only seeing 5mW poointers that seem too weak to me, but I dont know, they also have 100mW and 200mW pointers which I think sound too strong


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OfflineLogicaL ChaosM
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Re: Laser pointer strengths [Re: gopher]
    #26704591 - 05/29/20 01:04 PM (3 years, 7 months ago)

I have a 50mW green laser pointer and its definitely strong enough for Astronomy (i used to use it at raves). I would say minimal is 25mW.


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Offlinelongbus
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Re: Laser pointer strengths [Re: LogicaL Chaos]
    #26704607 - 05/29/20 01:08 PM (3 years, 7 months ago)

How do you use it for astronomy?


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OfflineTripsurfer
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Re: Laser pointer strengths [Re: longbus]
    #26704623 - 05/29/20 01:13 PM (3 years, 7 months ago)

I am curious about that also


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OfflineLogicaL ChaosM
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Re: Laser pointer strengths [Re: longbus]
    #26704624 - 05/29/20 01:13 PM (3 years, 7 months ago)

By pointing it at stars and constellations. Its really for helping other people learn Astronomy. It can also be useful for guiding a telescope.


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Re: Laser pointer strengths [Re: LogicaL Chaos]
    #26704626 - 05/29/20 01:14 PM (3 years, 7 months ago)

Holy dang. You're saying that you can actually point to the sky with a laser?! That's trippy as fuck man!


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OfflineLogicaL ChaosM
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Re: Laser pointer strengths [Re: longbus]
    #26704635 - 05/29/20 01:17 PM (3 years, 7 months ago)

uhhh yeah. Its a laser pointer!

Jump to 17:09


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Offlinelongbus
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Re: Laser pointer strengths [Re: LogicaL Chaos]
    #26704642 - 05/29/20 01:19 PM (3 years, 7 months ago)

I am just taken aback that it goes that far. I wonder if they could see it from space :awehigh:


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OfflineLogicaL ChaosM
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Re: Laser pointer strengths [Re: longbus]
    #26704673 - 05/29/20 01:30 PM (3 years, 7 months ago)

It looks like it goes on forever but Im not really sure :shrug:

Within the near-perfect vacuum of space, it just might go on forever. :shrug:

Green laser pointers are the da bomb. I highly recommend one. 50mW is where its gets pretty chill :solidnod:


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OfflineTripsurfer
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Re: Laser pointer strengths [Re: LogicaL Chaos]
    #26704676 - 05/29/20 01:32 PM (3 years, 7 months ago)

That looks amazing


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Re: Laser pointer strengths [Re: LogicaL Chaos]
    #26704678 - 05/29/20 01:33 PM (3 years, 7 months ago)

Heres a used 100mW: https://www.ebay.com/itm/100mW-Pen-Laser-Pointer-Green-Very-Strong/143573479926?hash=item216da571f6%3Ag%3ApXwAAOSwc6ReinNG&LH_BIN=1

Whats ironic about laser pointers is that they are similar to LSD tabs such as being advertised as 100 micrograms but are really more like 95 micrograms. Lasers that say they are 100mw are actually less around 90mw, but still very bright.

Same video, jump to 19:49


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Re: Laser pointer strengths [Re: Tripsurfer] * 1
    #26704680 - 05/29/20 01:33 PM (3 years, 7 months ago)

lol when I was a little kid me and my friends would sneak around the neighbourhood shining them in peoples windows. They would get so freaked out. We were little shits lol. :bucktoothfattygangsta:


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OfflineLogicaL ChaosM
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Re: Laser pointer strengths [Re: longbus]
    #26704683 - 05/29/20 01:34 PM (3 years, 7 months ago)

Was it a red or green laser? Did you pretend to be snipers :awehigh:


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Re: Laser pointer strengths [Re: LogicaL Chaos] * 1
    #26704691 - 05/29/20 01:38 PM (3 years, 7 months ago)

We were pretending to be spies lol, this is right around when those spy kids movies came out. It was a red one, sometimes we for sure pretended that it was a sniper dot hahaha. The best is when you would get a mirror, that really freaked em out lol. :fatfear:


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Offlinekoods
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Re: Laser pointer strengths [Re: longbus] * 1
    #26704695 - 05/29/20 01:39 PM (3 years, 7 months ago)

Quote:

longbus said:
I am just taken aback that it goes that far. I wonder if they could see it from space :awehigh:




They did an experiment with search lights pointed at the space station and the space station said they could see them.



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OfflineLogicaL ChaosM
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Re: Laser pointer strengths [Re: longbus]
    #26704697 - 05/29/20 01:40 PM (3 years, 7 months ago)

haha, nice. I used to play with the undersides of CDs with my laser pointer at raves/festivals. Its a great combo :yesnod:


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InvisibleAsante
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Re: Laser pointer strengths [Re: LogicaL Chaos]
    #26704977 - 05/29/20 03:38 PM (3 years, 7 months ago)

Guys, stronger lasers than the 5mw laser exist but.. one brief flash of a reflection of one of those lasers can either completely destroy the vision in that eye or cause a huge black spot in the center of your vision that will stay there all your life.

Dont fuck with lasers unless you know what you're doing and wear the appropriate laser goggles for a laser of that strength type and color.

That said, human eyes detect green light the best. It seems brightest, which is why most laser pointers and serious glowsticks are green in color.


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Re: Laser pointer strengths [Re: Asante]
    #26714896 - 06/02/20 07:05 PM (3 years, 7 months ago)

That's really good advice Asante! Lasers are serious business.


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OfflineLogicaL ChaosM
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Re: Laser pointer strengths [Re: Asante]
    #26715092 - 06/02/20 08:31 PM (3 years, 7 months ago)

Good advice but dont let the power of lasers prevent u from using them. Just practice safe laser usage and you will be fine.


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OfflineIce9
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Re: Laser pointer strengths [Re: LogicaL Chaos] * 1
    #26715119 - 06/02/20 08:46 PM (3 years, 7 months ago)

Also remember for the same mW rating, red<green<blue.  You can see a lasers source and it's endpoint but the atmosphere will disperse the polarized photons.  My friend worked in an optics lab that had a 5W laser, if your hand accidentally passed through the beams path(which you can't see) it would cause immediate 3rd degree burns and looking at the lasers endpoint without safety googles would blind you.


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The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore, all progress depends on the unreasonable man. -- George Brenard Shaw


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OfflineLogicaL ChaosM
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Re: Laser pointer strengths [Re: Ice9]
    #26715397 - 06/02/20 11:07 PM (3 years, 7 months ago)

Damn! Yeah a 5 watt laser is some serious business! I think anything above 500mW is capable of burning things if I recall.


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