1 Place the cotton balls in areas where mice are likely to enter your house, by doorways or heat vents, etc. 2  Another helpful deterrent is to grow peppermint plants near the entryways. 3  You can use the mint in cooking as well as it serving a deterrent purpose.
Nov 12, 2015. 20 kilometers (12 miles) for a 1 milliwatt beam. Laser light can travel 20 kilometers (12 miles) per-milliwatt that is contained within the laser.
Some injuries were accidental, but others involved a playmate intentionally pointing the laser beam at the victimâs eye. The distance between the victimâs eye and the laser beam ranged from a half-meter to 6 meters, roughly 1.7 feet to 20 feet. Those who suffered retinal holes were injured at the closest distance, around a half-meter. Generally, injury from greater distance resulted in less serious damage.