Infrared radiation

From WikiMD's Wellness Encyclopedia

Template:Infobox electromagnetic radiation

Infrared radiation (IR) is a type of electromagnetic radiation that is invisible to the human eye but can be felt as heat. It lies between the visible light and microwaves in the electromagnetic spectrum, with wavelengths from approximately 700 nanometers (nm) to 1 millimeter (mm).

Characteristics[edit | edit source]

Infrared radiation has longer wavelengths than visible light and is therefore less energetic. It is commonly associated with thermal radiation, as any object not at absolute zero emits radiation in the infrared spectrum. The intensity of IR radiation increases with temperature, which allows for its use in various thermal imaging and heating applications.

Sources[edit | edit source]

The primary source of infrared radiation is heat or thermal radiation. Any object that has a temperature radiates in the infrared. Even objects that we think of as being very cold, such as ice cubes, emit infrared. The sun is also a significant source of infrared radiation, though much of it is absorbed by the atmosphere.

Detection and Measurement[edit | edit source]

Infrared radiation is typically detected using infrared sensors, which are materials that change their electrical properties in response to infrared radiation. These sensors form the basis of thermal imaging cameras, which can create pictures of heat rather than light.

Applications[edit | edit source]

Infrared radiation has a wide range of applications. It is used in thermal imaging for security and surveillance, in weather forecasting, in heating, in infrared astronomy, and in health and medicine for treatments and diagnostics. Infrared saunas, which use IR radiation to heat the body, are popular for therapeutic benefits.

Health and Safety[edit | edit source]

While infrared radiation is generally safe, excessive exposure can lead to heat injuries and other health problems. Protective measures are recommended in environments where infrared exposure is significant.

See Also[edit | edit source]


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