you will need either a spectrometer or a digital camera most digital cameras will easily pick up infrared wavelengths emitted by lasers but, only if the digital camera is pointed directly in the path of the laser beam. The digital camera can be off the laser beams center a little but not by much. The laser beam will or should show up as a bright white shinny dot in the camera display. The more low end the digital camera the better (Camera phones are perfect for this sort of thing) newer digital cameras have ir filters that block a lot of infrared wavelengths.
Rotating lasers on sale can be found at Engineer Supply, Amazon, eBay, Red Back Lasers, Merchant Circle, Hultafors, Speedy Services, Lowes and Home Depot.
Alarm system
Optical data vdrives in computers and home entertainment, such as DVD and CD players / recorders. Lasers are used to make light shows. Lasers are also used in precision cutting machines.
The lasers that actually work to remove hair cost more than you'd want to spend for home use.
Some do it because they receive it at home, and feel like they need some type of dominance to prove themselves not at the bottom of the "food-chain"
The pointed end of a home plate faces the rear, away from the playing field. The home plate itself if in fair territory.
Babe Ruth
You have your attorney prove you will remain there and not leave.
Prove to her you can be responsible. Then ask her
The best way would be to show a receipt that you bought it.
Yes. You need to prove that you can pay for it as does everyone else.
Yes,a Labrador and German Shepherd can prove to be an excellent protection for home.