Radiometri: Me ke nan?

Me kana Radiometry?

Radiometry yana aiki a maimaita electromagnetic radiation don wata lambobin wavelength. Photometry na iya da radiometry, amma photometry ana iya da signals na light mai samun birni kawai, idan radiometry tana iya da signals na wata wavelength – kamar ultraviolet, infrared, da light mai samun birni.

Radiometry yana aiki a maimaita radiation na jiragen mutum da ma'adin. Daga cikin Planck’s law, duka ma'adin tana radiate energy a kan electromagnetic waves. Radiometry tana amfani a maimaita intensity na radiation.

Energy na electromagnetic radiation yana canzawa a kan Radiant Energy (Qe). Radiant energy transmitted per unit time yana canzawa a kan Radiant Flux (ф).

A cikin radial direction, radiant energy radiated from a point source per solid angle per unit time yana canzawa a kan Radiant Intensity.

Tabeli na biyu yana nuna comparison na various technical terms related to photometry and radiometry.

Me kana Microwave Radiometry?

Microwave radiometry tana amfani a maimaita thermally caused electromagnetic radiation na matter a kan physical temperature above zero kelvin (0 K). Wannan measurement na radiation tana taimakawa a bayyana properties na matter.

Microwave radiometry tana amfani a antennas and detectors da ake amfani a observe various scenes. Microwave radiometers tana amfani a receive electromagnetic radiation caused by the matter or body.

Amount na radiation revived by a microwave radiometer tana canzawa a kan equivalent body temperature and wannan temperature yana canzawa a kan brightness temperature.

Brightness temperature distribution tana almost a weather independent indicator.

Daga cikin figure na biyu, radiofrequency signal tana receive by the antenna. A Dicke Switch tana amfani a calibrating the high-frequency signal.

Sai dai high-frequency signal tana convert into the intermediate frequency with the help of a local oscillator signal.

Sai dai signal pass through the Low Noise Amplifier (LNA) and bandpass filter