16 Facts About Infrared

Infrared, sometimes called infrared light, is electromagnetic radiation (EMR) with wavelengths longer than those of visible light.

Infrared radiation is emitted or absorbed by molecules when changing rotational-vibrational movements.

Infrared radiation is used in industrial, scientific, military, commercial, and medical applications.

Infrared astronomy uses sensor-equipped telescopes to penetrate dusty regions of space such as molecular clouds, to detect objects such as planets, and to view highly red-shifted objects from the early days of the universe.

Infrared radiation is generally considered to begin with wavelengths longer than visible by the human eye.

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Infrared radiation is popularly known as "heat radiation", but light and electromagnetic waves of any frequency will heat surfaces that absorb them.

Infrared is used in night vision equipment when there is insufficient visible light to see.

Infrared radiation is used in cooking, known as broiling or grilling.

Infrared communications are useful for indoor use in areas of high population density.

Infrared is the most common way for remote controls to command appliances.

Infrared lasers are used to provide the light for optical fiber communications systems.

Infrared vibrational spectroscopy is a technique that can be used to identify molecules by analysis of their constituent bonds.

Infrared can be used to detect protostars before they begin to emit visible light.

Infrared light is useful for observing the cores of active galaxies, which are often cloaked in gas and dust.

Infrared cleaning is a technique used by some motion picture film scanners, film scanners and flatbed scanners to reduce or remove the effect of dust and scratches upon the finished scan.

Infrared was surprised at the result and called them "Calorific Rays".