Lesson Summary. Infrared waves are just part of the electromagnetic spectrum; to be exact, they're waves that have a wavelength between 700 nm (nanometers) and 1 mm. This can't quite be detected by human eyes-it is just beyond the red side of the rainbow.esson Summary. Infrared waves are just part of the electromagnetic spectrum; to be exact, they're waves that have a wavelength between 700 nm (nanometers) and 1 mm. This can't quite be detected by human eyes-it is just beyond the red side of the rainbow.
Also called split rail or post and rail, a ranch-style vinyl fence with two to four rails typically costs do-it-yourselfers $4-$12 a linear foot for materials; with a gate and other options do-it-yourself materials can total $500-$1,400 for 100' of fencing and $3,500-$10,000 to enclose a simple square acre (about 830').
1 Vinyl fence installation costs $25-$35 per linear foot. 2  Chain link fence installation costs $7.50-$15 per liner foot. 3  Most contractors will provide an estimate inclusive of all parts, including posts, gates, brackets, post caps, hinges, concrete, and all the other odds and ends that go into installing fence. The prices below reflect an average fence height of 5-6 feet tall. 2  Wood fence installation costs $15-$25 per linear foot. 3  Vinyl fence installation costs $25-$35 per linear foot.