2. Introduction
Almost all of the energy available at Earth’s surface comes
from the sun. The sun gets its energy from the process of
nuclear fusion. This process occurs in the sun’s core or
nteriorgreati British astronomer Sir William Herschel with the
discovery of infrared radiation in 1800.
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3. What is infrared radiation?
Infrared radiation (IR), also called infrared light, is a
form of electromagnetic (EM) radiation Infrared (IR)
has wavelengths λ between 750 nm and 1 mm, which
corresponds to a frequency range from 300 GHz to
400 THz.
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4. How do infrared rays work?
An infrared camera detects the thermal energy or
heat emitted by the scene being observed and
converts it into an electronic signal. This signal is then
processed to produce an image. The heat captured by
an infrared camera can be measured with a high
degree of precision.
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