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.
Traveling at a speed where you cross nearly 200,000 miles every second for eight full minutes would only get you to the center of our solar system. A light beam needs only 8 minutes to travel the 93 million miles (150 million kilometers) from the sun to the Earth.