Infrared (IR) light is used by electrical heaters, cookers for cooking food , short-range communications like remote controls, optical fibres, security systems and thermal imaging cameras which detect people in the dark. The heating effect of IR can cause burns to the skin.
How are infrared waves used in society?
The most common use of infrared in everyday life is remote controls . These work by sending pulses of infrared that spell out a message to an electronic device. This device could be a television, blu-ray player, or even a computer. Infrared can be used in a similar way for communication.
How are infrared waves used in technology?
Thermal, or infrared, detection systems utilize sensors to pick up radiation in the infrared part of the electromagnetic spectrum . 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.
What is an example of infrared radiation?
The heat that we feel from sunlight, a fire, a radiator or a warm sidewalk is infrared. ... Infrared light is even used to heat food sometimes – special lamps that emit thermal infrared waves are often used in fast food restaurants! Shorter, near infrared waves are not hot at all – in fact you cannot even feel them.
What are 3 uses of infrared waves?
Infrared (IR) light is used by electrical heaters, cookers for cooking food , short-range communications like remote controls, optical fibres, security systems and thermal imaging cameras which detect people in the dark. The heating effect of IR can cause burns to the skin.
What are the dangers of infrared?
Prolonged exposure to IR radiation causes a gradual but irreversible opacity of the lens . Other forms of damage to the eye from IR exposure include scotoma, which is a loss of vision due to the damage to the retina. Even low-level IR absorption can cause symptoms such as redness of the eye, swelling, or hemorrhaging.
What is the function of infrared?
Infrared waves have longer wavelengths than visible light and can pass through dense regions of gas and dust in space with less scattering and absorption . Thus, infrared energy can also reveal objects in the universe that cannot be seen in visible light using optical telescopes.
How can I see infrared?
Look at the viewfinder or screen of your camera/camcorder or mobile phone . If the remote control sends a signal, you should see a light in the viewfinder or screen of your camera/camcorder or mobile phone when you press a button on the remote control.
What color is infrared?
The invisible near infrared light of CIR can be “seen” by shifting it and the primary colors over as shown at left. Near infrared wavelengths become visible as red while red wavelengths appear as green and green as blue.
Are heat and infrared the same?
Infrared is radiated heat: the feeling of warmth from the sun on your face; the heat from a coal fire, or a toaster. It is even the same form of heat emitted by your own body . ... Infrared waves travel through the air and when they touch a surface, heat energy is released regardless of the surrounding air temperature.
What materials can infrared pass through?
Glass, Plexiglas, wood, brick, stone, asphalt and paper all absorb IR radiation. While regular silver-backed mirrors reflect visible light waves, allowing you to see your reflection, they absorb infrared radiation. Gold, manganese and copper also absorb IR radiation well.
What are the sources of infrared radiation?
Common natural sources are solar radiation and fire . Common artificial sources include heating devices, and infrared lamps used and in the home and in infrared saunas for health purposes. Industrial sources of heat such as steel/iron production also fall into the infrared region.
How is infrared used for communication?
Infrared transmission systems are widely used for short-range communications . A common application for infrared is in remote control systems for televisons, VCRs, DVD players and set-top boxes of various descriptions. ... Infrared communication is therefore a realistic alternative for indoor wireless LANs.
What are the types of infrared?
- Infrared is usually divided into 3 spectral regions: near, mid and far-infrared. ...
- Near-infrared observations have been made from ground based observatories since the 1960’s. ...
- Infrared radiation is emitted by any object that has a temperature (ie radiates heat).
What does infrared light do to the body?
Unlike ultraviolet light – which has damaging effects upon the tissues and cells of the body – infrared light helps cells regenerate or repair themselves . Infrared light also improves the circulation of oxygen-rich blood in the body, promoting faster healing of deep tissues and relieving pain.
