Wednesday, July 6, 2011

EM Wave - Infared

What is Infared?

Infared is an energy radiation with a frequency not visible to human eyes. Infrared light lies between the visible and microwave portions of the electromagnetic spectrum. Infared wavelengths ranges. The longer, far infrared wavelengths are about the size of a pin head and the shorter, near infrared ones are the size of cells, or are microscopic. (NASA Science)


Infared can damage human cell tissue.
It needs a direct line of sight between the transmitter and receiver. For example, it doesn't work through walls or doors.
It causes Sunburn.

Advantages (Uses of Infared):

Night vision: Night vision devices operate through a process involving the conversion of ambient light photons into electrons which are then amplified by a chemical and electrical process and then converted back into visible light.

Tracking: Infrared tracking, also known as infrared homing, refers to a passive missile guidance system which uses the emission from a target of electromagnetic radiation in the infrared part of the spectrum to track it. Missiles which use infrared seeking are often referred to as "heat-seekers"

Heating: Infrared radiation can be used as a deliberate heating source. For example it is used in infrared saunas to heat the occupants, and also to remove ice from the wings of aircraft (de-icing).

Communications: IR data transmission is also employed in short-range communication among computer peripherals and personal digital assistants.

Others uses:
Hyperspectral imaging, Thermography, Spectroscopy, Meteorology, Climatology, Astronomy, Art history, Biological systems, Photobiomodulation, Health hazard.


Group members: Benz, Jia Sheng, Karan, Idris


  1. Great Job! Very detailed! Dangers of Infrared, however could be elaborated further like examples of how the dangers are implemented on household appliances.

  2. (Y) specific and a variety of information.

  3. There are a lot of information given, and the information you have given is specific and easy to understand.