Crossword clues for radiometer
The Collaborative International Dictionary
Radiometer \Ra`di*om"e*ter\ (r[=a]`d[i^]*[o^]m"[-e]*t[~e]r), n.
(Naut.) A forestaff.
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(Physics) An instrument designed for measuring the mechanical effect of radiant energy.
Note: It consists of a number of light disks, blackened on one side, placed at the ends of extended arms, supported on a pivot in an exhausted glass vessel. When exposed to rays of light or heat, the arms rotate.
Wiktionary
n. A device that measures radiant energy.
WordNet
n. meter to detect and measure radiant energy (electromagnetic or acoustic)
Wikipedia
A radiometer or roentgenometer is a device for measuring the radiant flux (power) of electromagnetic radiation. Generally, a radiometer is an infrared radiation detector or ultraviolet detector.
The name Radiometer is frequently used to refer to a Crookes radiometer ("light-mill"), an early model device wherein a rotor (having vanes which are dark on one side, and light on the other) in a partial vacuum spins when exposed to light. A common myth (one originally held even by Crookes) is that the momentum of the absorbed light on the black faces makes the radiometer operate. If this were true however, the radiometer would spin away from the non-black faces, since the photons bouncing off those faces impart even more momentum than the photons absorbed on the black faces. Photons do exert radiation pressure on the faces, but those forces are dwarfed by other effects. The final explanation depends on having just the right degree of vacuum, and is more related to the flow of heat than the direct effect of photons.
The Nichols radiometer operates on a different principle and is more sensitive than the Crookes type.
A microwave radiometer operates in the microwave wavelengths. The radiometer contains argon gas to enable it to rotate.
The MEMS radiometer, invented by Patrick Jankowiak, can operate on the principles of Nichols or Crooke and can operate over a wide spectrum of wavelength and particle energy levels.
Radiometer is a company founded in 1935 with headquarters in Copenhagen, Denmark. They have 2,200 employees worldwide and had sales of USD 496 million in 2010. The first pH meters specialized for medical use were marketed around 1936 by Radiometer in Denmark. Arnold Orville Beckman started selling the first pH meters for industrial use in the United States in 1935. Radiometer was acquired by Danaher in 2004 and Beckman Coulter - the company founded by Arnold O. Beckman - was also acquired by Danaher in 2011.
Usage examples of "radiometer".
The radiometer went almost down to black, and he released a bubble of relief.
At the same time he saw no particular harm in letting him use the radiometer, if that was what it was.
When the big doors were open Grushko climbed into the back and, with the radiometer switched on, he walked the length of the container and back again.
A loud knock summons Tanya to the door where she finds herself confronted by several men wearing radiation suits and carrying a radiometer before them like some small ark of the convenant.
Kaplan replied, quite properly, that the infrared radiometer experiment was not designed to test such questions, nor did it.
The new infrared radiometer on which Rick worked was solely a receiving unit.
Because different objects have different capacities to retain heat, the radiometer could distinguish between them.
The radiometer itself was a small aluminum rectangular cake tin, its bottom covered with black polka dots, the infrared sensors.
The radiometer sensor dish fitted into one end and the image tube into the other.
The radiometer projected out nearly a foot in front of his face, suspended from the helmet by aluminum rods.
Jan held something that flared in the radiometer tube, something so bright that it had a halo like a bright ring around it.
I had the IR radiometer helmet on, and I could see the girls fine, so I knew they were okay, but I also saw that Jan was kneeling on the carpet and holding a miniature sun in her hands.
Rick, you say the stone was so bright in the radiometer that it had a halo?
Specialized kinds of radiometer include the dosimeter, gamma spectrometer, and Geiger counter.
We use ASTER technology, Advanced Spaceborne Thermal Emission and Reflection Radiometer instruments built into various satellite platforms to track groupings of gases associated with decomposition.