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.
Think Critically Explain why the brightness of the lightemitted by a flashlight decreases as the flashlightmoves farther away from you. Summary Light and Electromagnetic Wavesâ¢ Light waves are electromagnetic waves. Thesewaves travel through empty space at a speed â¢ of 300,000 km/s.