- Radiometer
A radiometer is a device for measuring the radiant flux (power) of
electromagnetic radiation . Generally, the term “radiometer” denotes aninfrared radiation detector, yet it also comprises detectors operating on anyelectromagnetic wavelength, e.g. spectroradiometer.A radiometer's characteristics are:
* spectral range
*spectral sensitivity
*angle of view
* directional responseRadiometers detect and measure radiation as thermal (convert absorbed energy to a signal) and
photodiode (photons absorbed at a constant response/quantum). The radiometer's radiation-detectingbolometer absorbs radiation falling upon it, raising its temperature, then is measured with a thermometer. The higher temperature might be related to the incident radiation's power.The
Crookes radiometer is an early-model infrared-radiation and light-detector. A variant type of is theNichols radiometer that operates on a different principle, and is more sensitive than the Crookes type.A
Microwave radiometer operates in theMicrowave wavelengths. The radiometer contains argon gas to enable it to rotate. Keely said that when you vibrate an atomic substance (e.g., argon) with an atomic vibration (e.g., microwave) you get rotation. When you put a radiometer containing an atomic elemental gas, such as argon, into a microwave, it causes it to spin, thus the microwave interaction with the argon gas is creatingrotational raleigh wave s [ [http://video.google.ca/videoplay?docid=9125003792513982191&ei=Z-jwSL_yOoXE-wGIlr3iDg&q=dale+pond&hl=en] Dale Pond Lecture: The Basic Principles of Sympathetic Vibratory Physics] .As an eponym, radiometer usually denotes a Crookes radiometer, a device wherein a rotor (with dark and light vanes) spins when exposed to light in a partial vacuum.
ee also
*
Net radiometer (instrument)
*Pyranometer (instrument)
*Photometry (optics) Main article - explains technical terms and unitsExternal links
* [http://www.radiometernewforce.com/ Use of Radiometer as an Alternative Energy Source]
* [http://www.svpvril.com/ Sympathetic Vibratory Physics - John Worrell Keely's Sacred Science]
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