Results 291 to 300 of about 124,376 (308)
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2011
Spectrally Unselective Systems. As discussed in Chap. 2, by utilizing the thermoelectric reception, having practically equal to unity absorptance over a relatively broad spectral region.
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Spectrally Unselective Systems. As discussed in Chap. 2, by utilizing the thermoelectric reception, having practically equal to unity absorptance over a relatively broad spectral region.
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Simplifications in the transformation of net radiometers into hemispherical radiometers
Agricultural Meteorology, 1972Abstract In a recent paper in this journal (Idso, 1971) I described a technique for transforming polyethylene-shielded net radiometers into hemispherical radiometers. It consisted essentially of constructing a second set of domes, sandwiching three fine thermocouples between the bottom pair, applying a spray application of black and then white paint ...
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The Journal of the Acoustical Society of America, 1998
An electromagnetic radiometer is a well-known physics demonstration and toy. When exposed to light of sufficient intensity, the vanes rotate in the opposite direction if radiation pressure were the mechanism. That is, the reflective white side leads the absorptive black side.
Andrés Larraza +3 more
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An electromagnetic radiometer is a well-known physics demonstration and toy. When exposed to light of sufficient intensity, the vanes rotate in the opposite direction if radiation pressure were the mechanism. That is, the reflective white side leads the absorptive black side.
Andrés Larraza +3 more
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Physics Education, 1978
The motion of a Crookes radiometer is calculated both in a good vacuum and in a poor one. It is found that the sense of rotation in a perfect vacuum depends on the angle between the vertical and the direction of the light source, while for the imperfect vacuum the push exerted by gas molecules is dominant, even though most of the energy lost is ...
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The motion of a Crookes radiometer is calculated both in a good vacuum and in a poor one. It is found that the sense of rotation in a perfect vacuum depends on the angle between the vertical and the direction of the light source, while for the imperfect vacuum the push exerted by gas molecules is dominant, even though most of the energy lost is ...
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Journal of Colloid and Interface Science, 1967
Abstract The terms radiometer force, thermal force, and photophoretic force are examined. Various dynamic regimes embodied by the term thermal force are discussed in detail.
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Abstract The terms radiometer force, thermal force, and photophoretic force are examined. Various dynamic regimes embodied by the term thermal force are discussed in detail.
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Journal of Scientific Instruments, 1954
A radiometer, which measures directly the flux of radiant energy integrated throughout a hemisphere, is described. It consists of a very light electrical resistance thermometer element which is suspended, thermally isolated in high vacuum, behind an infra-red transmitting window.
John Theodore Houghton, A W Brewer
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A radiometer, which measures directly the flux of radiant energy integrated throughout a hemisphere, is described. It consists of a very light electrical resistance thermometer element which is suspended, thermally isolated in high vacuum, behind an infra-red transmitting window.
John Theodore Houghton, A W Brewer
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Radio Science, 1973
The optimum signal processing to follow a given radiometer front‐end is derived when it is desired to estimate, with smallest rms error, the temperature of a radio source. We find, for the important special case of small sources, that the optimum radiometer is implemented by the use of a compensating filter followed by square‐law detection and ...
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The optimum signal processing to follow a given radiometer front‐end is derived when it is desired to estimate, with smallest rms error, the temperature of a radio source. We find, for the important special case of small sources, that the optimum radiometer is implemented by the use of a compensating filter followed by square‐law detection and ...
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