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.
Imagine the sun to be a spherical gun shooting photons in all directions. These photons travel at the speed of light in straight lines, and can be characterised as 'rays of light'. What it means to say that light takes approx. 8 minutes to reach the earth from the sun is that these photons take approx. 8 minutes to travel the distance between the earth and the sun at their speed (the speed of light).