Infrared Wave Length & Working Range

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Discussion Overview

The discussion centers on the wavelength of infrared waves and their working range, particularly in relation to infrared receivers and transmitters. Participants explore the characteristics of infrared waves within the electromagnetic spectrum and seek clarification on specific applications and definitions.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant seeks information about the wavelength of infrared waves and their working range.
  • Another participant clarifies that infrared waves are part of the electromagnetic spectrum, positioned before visible light, and are associated with lower frequency and energy.
  • A participant requests clarification on the term "working range" in the context of infrared technology.
  • There is a specific inquiry about the working range of infrared receivers and transmitters, including comparisons to RFID passive tags.
  • One participant mentions the wavelength range of infrared as roughly 750 nm to about 1 mm, noting potential disagreements on the upper boundary.
  • Another participant provides detailed information on the short-wave infrared (SWIR), mid-wave infrared (MWIR), and long-wave infrared (LWIR) ranges, indicating specific wavelength values and their relevance to detector responses and transmission windows.

Areas of Agreement / Disagreement

Participants express varying levels of understanding and definitions regarding infrared wavelengths and their applications. There is no consensus on the precise boundaries of infrared wavelengths or the specifics of the working range for infrared devices.

Contextual Notes

Some claims about wavelength ranges and definitions may depend on specific contexts or applications, and there are unresolved questions regarding the terminology used in the discussion.

kowshikd7
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i want to know about wave length of infarade wave and working range
 
Science news on Phys.org


What do you want to know about it (them)?
 


Infrared(I think that's what you mean by infarade) waves encompass the region of the electromagnetic spectrum right before light, commonly considered as heat radiation. As it is present right before light, it has a frequency that is a bit lower, and a wavelength that is higher as a result of the equation given in a post above. Due to the lower frequency, it also has less energy, also given in an equation in a post above.

Or, in less nerdy terms, infrared is the segment before light, with lower energy/frequency.
 


kowshikd7 said:
i want to know about wave length of infarade wave and working range
What do you mean by "working range"?
 


I want to know about the working range of Infrared receiver and transmitter and also if there is any type of IR transmitter just like as RFID Passive tag
 


is the wavelength of light the frequency that it sends out photons?

what? makes no sense.
 


Infrared is the part of the EM spectrum between the upper end of visible and microwaves.
Roughly 750 nm to about 1 mm. I am sure there is some disagreement on the upper boundary, but long wavelength IR and microwaves have a lot in common.
 
kowshikd7 said:
i want to know about wave length of infarade wave and working range

Typically, short-wave infrared (SWIR) is from 0.7 um to 1.1 um, the part of the spectrum we can't see but that Si detectors can still respond to. Mid-wave (MWIR) is about 3-5 um and long-wave (LWIR) is 8-12 um: both bands are set by absorbance bands of water, and the MWIR and LWIR bands are within 'transmission windows'. Going out further, for example in FTIR measurements, the far infrared can go out to about 20um or more.
 

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