Home > categories > Security & Protection > Reflective Material > If you left a bible in someones carport on Christmas eve, and they have been backing over it like a speed bump?
Question:

If you left a bible in someones carport on Christmas eve, and they have been backing over it like a speed bump?

ever since then, would you take it back?

Answer:

now see if you had onstar you would call onstar and they could unlock ur car from a push of a button . i have left my keys in my 2007 cat. sts-v like 4times and all i had to do was call them up and within mins i had my doors unlocked for free ( i got 1 year free when i got the car)
Alright, so the reason that it is easy to see the green laser in the air is because of a couple of things. First off, you can only see something when light bounces off of it. There are all sorts of things in the air, so you can see the green light being bounced off of them. But there is another reason and it has to do with how your eyes work You have three different cone cells in your eye that see color, sometimes confusingly called red, blue and green. But here is the thing, they aren't spread out nice and evenly over the whole visible spectrum. The Blue cone peaks at around the 420 nm range, the other two at around 530 and 560 nm. As you move farther away from these peaks you get less sensitivity for that particular cone. Notice that the green and red cones are really close together. There is a lot of overlap in sensitivity for those two in the 500-580 range. Especially around 550. These are the areas that are generally considered hues of green. Even the blue cone extends somewhat into the green colors. This all means that our eyes are really really good at seeing the color green, so even though the air looks fairly clear to you, and even though those little bits of particles in the air are only reflecting a tiny amount of green light, you can still see it. This also means that a green laser is easier to see than say a red laser or a blue laser of the same power. From my limited experience with a blue laser (450 nm I think can't remember off the top of my head, 5mw though) it seems very unlikely that you will be able to see the beam in the air unless it is really dark and really foggy. In fact, the dot will look a lot dimmer than a green laser of the same power.

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