4 ms·
> In a normal room you can see the laser beam in dark. Dear god, do you live next to a coal plant? I would argue that in a normal room one should NOT be able
by Traubenfuchs 6y ago
> In a normal room you can see the laser beam in dark.
Dear god, do you live next to a coal plant? I would argue that in a normal room one should NOT be able to see the laser beam!
- joncrane 6y agoYou'd be surprised how "dirty" (dusty) the air inside houses is.
- metiscus 6y agoEspecially given the relatively wide range for age and consequently construction type. I've found that newer drywall construction tends to be more dusty in my limited experience than well maintained plaster and lath.
- yborg 6y agoWall-wall carpet, especially old carpet, is a dust factory.
- metiscus 6y agoMy house has tile floors which get visibly filthy really quickly. I have a roomba and I personally clean the floors quite often manually. In my parents house which had wall to wall carpet, they would vacuum relatively infrequently but the same amount of dirt was likely being tracked in and around. Their house was more dusty than mine seems to be because of the fact that carpet tends to hide how "dirty" it is.
- myself248 6y agoLatch the laser beam on, aim it across the room, and go thump your hand on the couch cushions a few times.
- rootusrootus 6y agoRed laser, sure, but in my experience green lasers are significantly brighter and it's much easier to see the beam in clear air (though if you're human you probably need to look down the beam to spot it, my cats can see the beam horizontally and they swat at it).