Infrared Rays

What is Infrared Ray?

Infrared waves are also called heat or thermal waves. This phenomenon occurs because they have a particular heat-inducing property. These waves have a wavelength range between 710 mm to 1mm. Sometimes infrared rays themselves are categorized into near-infrared and far-infrared rays. Near-infrared rays are profoundly used in electronic applications like TV remote sensors and photography. Applications of Infrared rays in the real world can be somewhat similar to applications of visible light because their wavelength ranges are close by. Far infrared rays are generally more thermal. Anything which can generate heat gives out far-infrared Radiation. Even the human body (at approximately 37 deg-C) gives off infrared Radiation which is of around 800nm wavelength. The infrared ray has many applications worldwide in different branches of science.

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Characteristics of IR Rays

Given below are a few characteristics of infrared Radiation.

  1. Infrared Radiation characteristics are:

  2. Infrared Radiation has its Origin from the Alteration in the movement of electrons.

  3. Infrared Radiation has its Wavelength Range from   710 mm to 1mm

  4. Infrared Radiation has its Frequency from:430 THz – 300 GHz

  5. The infrared Radiation Wave type is, Transverse Wave

  6. Infrared Radiation has its Speed of   3 ×108 m/s

  7. Infrared Radiation, Exhibits the property of refraction.

  8. Thermal Properties of Infrared Radiation include: Exhibiting of heat-inducing property.

Absorption and Reflection characteristics of Infrared Radiation is that they can be absorbed or reflected depending on the nature of the surface that it strikes.

IR Rays Use

Infrared Radiation is used extensively in applications like remote sensing, which is used in all types of weather applications. All bodies can give off some thermal energy, and by relying on this property, infrared rays have opened to us a wide variety of operations in covert operations as well. Concerned with Infrared rays, they find their application in the field of astronomy too.

Infrared light can also be termed as warm light. The light which falls on our body when we sit near a campfire or even the light of the sun, these kinds of lights can also emit some thermal energy which can cause us to feel the heat. Infrared heaters also come under this category where they generally use infrared Radiation to generate thermal energy.

Infrared Radiation is often used in industrial, scientific, military, law enforcement, and medical applications. Night-vision devices are used extensively; active near-infrared illumination allows people or animals to be observed without detecting the observer. Infrared astronomy predominantly uses sensor-equipped telescopes which helps the detectors to penetrate dusty regions of space such as molecular clouds, detect objects such as planets, and it helps to view heavily red-shifted objects from the early days of the universe. Infrared thermal-imaging cameras are used predominantly to detect heat loss in the insulated systems, which is used to observe changing blood flow in the skin, and to help to detect overheating of electrical apparatus.

Infrared Rays have extensive uses for military and civilian applications, including target acquisition, surveillance, night vision, homing, and tracking. Humans at average body temperature can radiate chiefly at wavelengths around ten μm (micrometres). Applications that are Non-military generally include thermal efficiency analysis, advanced environmental monitoring, new industrial facility inspections, prior detection of grow-ops, the technology of remote temperature sensing, different short-range wireless communication, spectroscopy, and weather forecasting.

Solved Examples

1. Which Rays are Used in TV Remote?

The primary technology which is used in remote home controls is infrared (IR) light. The signal that is present between a remote control handset and the device it controls includes the pulses of infrared light, which is invisible particular to the human eye but can be seen easily through a digital camera, video camera or a phone camera. The transmitter which is present in the remote control handset usually sends out a stream of pulses of infrared light when the user goes to press a button on the handset. A transmitter is usually known as a light-emitting diode (LED) which is generally built into the pointing end of the remote control handset. The infrared light pulses especially form a pattern unique to that button. The receiver in the device quickly recognizes the pattern and causes the device to respond repeatedly and accordingly.

Did You Know?

A hyperspectral image is a kind of "picture" which consists of a continuous spectrum through an extensive spectral range at each pixel. Hyperspectral imaging is extensively gaining importance in the branches of applied spectroscopy, particularly with NIR, SWIR, MWIR, and LWIR spectral regions. Typica and general applications include biological, mineralogical, defense, and industrial measurements. These applications are very much used to minimize our work, and continuously our technologies are enriched with the use of infrared rays.

FAQ (Frequently Asked Questions)

1. What is the Application of UAV in the Infrared Rays?

Thermal infrared hyperspectral imaging can be correctly performed in the same way using a thermographic camera, by the use of fundamental difference that each pixel contains, a full LWIR spectrum can be seen. Consequently, chemical identification of the object can be easily performed without any need for an external light source like the Sun or the Moon. Such cameras are mainly applied for geological measurements like outdoor surveillance and UAV application. These UAV type vehicles are essential for military services and other covert action missions. Especially where there is a chance of a leak of information if we try a man to lead and solve that particular mission.

2. What is Infrared Spectroscopy?

Infrared Ray Spectroscopy is a technique that can be extensively used to identify molecules by proper analysis of their constituent bonds. If an oscillation can lead to a discrepancy in dipole in the molecule, then it will surely absorb a photon that has a similar frequency to the infrared ray. The vibrational frequencies of most of all the molecules tend to correspond to the suitable frequencies of infrared light. The mid-infrared also helps in this type of application. A spectrum of all the frequencies together of absorption in a sample is recorded in parts. This can be reused to find out the information about the sample composition represented by chemical groups present, and also its purity will be assured. This is another use of Infrared rays.