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# Videos you wish to share part two.

Staff member

#### skijohn

##### Well-known member
Just imagine what you'd see in everyday life if the human eye could see sound waves!

#### ArcticDude

##### Super Moderator
Staff member
Huh, friday finally

#### ArcticDude

##### Super Moderator
Staff member
Holy leptons Batman & sorry for double post!

#### CurtisOliver

##### Well-known member
LPF Site Supporter

#### CurtisOliver

##### Well-known member
LPF Site Supporter
Want to stop speeding vehicles?
Also don't care if they live or die?

#### skijohn

##### Well-known member
Want to stop speeding vehicles?
Also don't care if they live or die?

That's awesome!

#### CurtisOliver

##### Well-known member
LPF Site Supporter
Found the trucks ones funny, the driver has no chance of survival. Might as well get speedy bricklayers to build a wall in the road.

#### skijohn

##### Well-known member
Found the trucks ones funny, the driver has no chance of survival. Might as well get speedy bricklayers to build a wall in the road.
Yes, 50 feet thick!

Staff member

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#### FAP

##### Member
Fifth force? I will watch that video next, came to post this. Could be of interest to members just to see how bright a low power laser pointer is at a distance.

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Staff member

### Negative Kelvin Temperature?​

#### RedCowboy

##### Well-known member
That is not a 5w laser, maybe a 1.5w and this guy is missing the fact that the source of the laser is not it's output at that Gatling units output lens but the facet at the p/n junction of the laser diode inside, you actually can't focus a laser to an infinity small point.

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#### paul1598419

##### Well-known member
The limit of the focus of a laser is its wavelength. One cannot focus it smaller than that. So, taking a 450nm laser one couldn't focus it to a point smaller than 450nm.