2006-11-24 19:01:39 · 5 answers · asked by sincere12_26 4 in Science & Mathematics ➔ Physics
Infra-red from either source are the same, the only variable is the wave length. For example U/V from the sun versus U/V from a tanning bulb are identical except that the tanning bulb produces U/V of a known wave length and the sun covers many wave lengths ranging from about 1,500 to 3,000 angstroms or so. Sunlight therefore produces variable wave lengths of Infra-red but the body does not. We use infra-red in medicine to determine areas of heat (infections or to indicate tumors by producing less Infra-red.)
2006-11-24 19:16:21 · answer #1 · answered by Frank 6 · 0⤊ 1⤋
Infra-red (IR) waves are electromagnetic waves of short order (Order of 10^-9). The basic characteristics of infra-red remain the same, irrespective of their nature of origin.
All IR waves are short range.
They can penetrate only through thin material.
IR cannot penetrate lead.
IR requires Line-of-Sight for transmission.
2006-11-25 03:12:15 · answer #2 · answered by Anonymous · 1⤊ 1⤋
Intensity and wavelength. Your body is much cooler than the sun, so not only is the wavelength longer, the intensity (which varies as the fourth power of the absolute temperature) is much less.
2006-11-25 03:27:29 · answer #3 · answered by Anonymous · 0⤊ 1⤋
There is no difference at all except for intensity.
Doug
2006-11-25 03:09:13 · answer #4 · answered by doug_donaghue 7 · 1⤊ 1⤋
intensity
2006-11-25 03:21:50 · answer #5 · answered by Merlin the Magician! 3 · 0⤊ 1⤋