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.
The laser beam is focused (narrowed) until. its diameter matches the 1266 nm diameter of a sphere placed in its. path. The sphere is perfectly absorbing and has density 5.00 103. kg/m3. What are (a) the beam intensity at the sphereâs location, (b) the radiation pressure on the sphere, (c) the magnitude of the corre-. sponding force, and (d) the magnitude of the acceleration that force.