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.
Using this method the achieved. resolution will be in the range of micrometers, but the maximum. range is limited to only a few meters. Up to distances of 100m. people often use the phase shift measurement. The laser light is. modulated and the phaseshift between outgoing and incoming. light gives the distance. To reach a resolution in the millimeter. range very high sampling rates are necessary.