Results for: Infrared-1

3 Contributions

Answered

In Science

What is infrared for used for?

Infrared is used for communication between devices, such as mobile phones transferring a song or television remotes. However, blue-tooth is far more popular nowadays. Infrared… (MORE)

Joseph Mendoza

+ 6 others found this useful

Idisjunction

266,086 Contributions

Answered

In Computer Keyboards

What is an infrared keyboard?

An infrared keyboard is a keyboard that transmits data to the computer via an infrared receiver. In practice, these have been exceedingly rare, since the advantage of being co… (MORE)

4 people found this useful

Quirkyquantummechanic

133,406 Contributions

Answered

In Technology

What is an infrared sensor?

An infrared sensor is a device (usually with supporting circuitry) that can detect infrared light (which is below the optical spectrum) for use to a purpose. Most of the remot…e controls for TVs and other entertainment equipment use infrared energy as the transmission medium to carry information between the control and the equipment to be operated. Infrared sensors also have important scientific, military, security and rescue applications since they can "see" the "radiant heat energy" which is infrared radiation. This electromagnetic energy is in the wavelengths from about 750 nm, which is the lower end of the optical spectrum, to well over 10,000 nm, deep in the infrared. The "heart" of the system per the question is a photodetector or photosensor. And it does its thing based on black body radiation, which it the emission of energy based on the temperature of the object. As the radiant energy is a direct function of temperature, even the slightest difference in temperature results in the radiation of a slightly different wavelength of infrared light. (A little hotter, a higher frequency or shorter wavelength - more toward visible light. A little cooler, and the opposite effect follows.) The infrared radiation falls on the sensor (there are a bunch of different kinds, and a range of operating frequencies and bandwidths depending on application) and, through photoelectric effect, changes the "nature" of the chemistry/physics of the photosensitive material. This is seen by supporting electronics as a change of resistance which changes current or voltage in the circuitry according to the way it was designed. The application in, say, entertainment equipment control is pretty straight forward. Astronomers use infrared "look-see" imaging systems, mostly cryo-cooled, to get a "different view" of stuff out in space. Wildlife photographers love this technology. It has opened "nature in the night" for us to view on TV. There are some medical applications. Industry finds broad application of the technology in inspection/process control and temperature monitoring. As regards the other applications, a person radiates heat from his body, and security sensors can detect this to provide information. Security systems can use the sensors in structures or even in open areas to detect warm-body intrusion. They are completely passive in this application and there is no "beam" to be broken or seen to give away the presence of the sensor. Fire departments are putting more and more of the devices into service because they can "see" through smoke and locate individuals being sought by rescuers. (The prices of this equipment are grossly high, by the way. The manufacturers are making a killing at the expense of the citizens, who ultimately pay for the stuff. Fire and rescue equipment needs to be top notch owing to its application, but come on....) The military applications in targeting systems are broad. The military eats these things up. There is thermal imaging visual recon equipment and there are "night scopes" on rifles. Infrared sensors can "see" people (owing to radiated body heat) and can also see very slight differences in the temperature between, say, a tank, and its surrounds. If memory serves, the "front line" or primary gun sight for the M-1 Abrams tank is the infrared sight, even in broad daylight. (And, if true, it might just be so that the gunner gets the "same" view of a target under any conditions; he doesn't have to make a transition from an optical sight to an infrared sight.) The Forward Looking InfraRed (FLIR) sensors in aircraft (rotorcraft or "fast movers") of all types have legendary performance, as demonstrated by the TV footage from the activities in the Persian Gulf. And missiles and smart bombs use them with devastating effect. You got links. Use 'em. Please. Thanks. (MORE)

14 people found this useful

Casey Claxton

19 Contributions

Answered

In Technology

Why infrared is named as infrared?

This has to do with the electromagnetic spectrum. Whether you know it or not, Gamma-rays, ultraviolet, X-rays, microwaves, visible light, infrared, and radio/tv waves are all … (MORE)

13 people found this useful

Ilovegs1

21 Contributions

Answered

In Computers

What is infrared used for?

Infrared light is a type of electromagnetic radiation. Its wavelength is longer than that of visible light, making it invisible to the naked eye unless special equipment and f… (MORE)

27 people found this useful

Answered

In Uncategorized

What is better the you phone 5c or 5s?

the 5s because it has better service but it dosent have diffrent colrs just silver gold and black

38 people found this useful

Answered

In Radiation

What are infrared radiation?

infrared radiation is a type of electromagnetic radiation, which involves waves rather than particles. This means that unlike conduction and convection radiation can even pass… (MORE)

Anand Mehta

252,417 Contributions

Statistician / Economist formerly employed in various Government Departments in the UK, freelance mathematics and statistics tutor since retiring in 2008, Fellow of the Royal Statistical Society.

Answered

In Math and Arithmetic

What is the answer to 20c plus 5 equals 5c plus 65?

20c + 5 = 5c + 65 Divide through by 5: 4c + 1 = c + 13 Subtract c from both sides: 3c + 1 = 13 Subtract 1 from both sides: 3c = 12 Divide both sides by 3: c = 4

James Vogel

557 Contributions

Der Vogelmann

Answered

In Uncategorized

Why is infrared called infrared?

Infra can mean "Sub" or "below." Picture a rainbow, the region just below RED, that you cannot see, is Infrared--"below the red." Likewise, Ultra means "… (MORE)

Eccles-Jordan Trigger Circuit

152,645 Contributions

This circuit is used in most electronic digital computers ever built & was invented in 1918 (patent GB148582). What is it now called?

Answered

In Science

Who invented infrared?

Nobody, infrared radiation is one part of the spectrum of electromagnetic radiation. It is naturally occurring and has been present everywhere since moments after the begi… (MORE)