infrared frequency
- noun
- /ˌɪnfrəˈrɛd ˈfrikwənsi/
- Specialized
:
frecuencia infrarroja
- The human body radiates at infrared frequencies.
Examples
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The human body radiates at infrared frequency.
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A curious fact is that almost everything around us is continually radiating energy in the infrared frequencies.
Blog text (18) -
It is, however, not transparent in the infrared frequencies, those emitted by the earth's warmth.
Blog text (15) -
Hoser quotes Willis and says, "A curious fact is that almost everything around us is continually radiating energy in the infrared frequencies."
Blog text (18) -
Many remote controls use infrared frequency to communicate with electronic devices.
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Security cameras can detect objects using infrared frequency even in complete darkness.
Synonyms
5
4.8
Light with waves longer than red light that you cannot see but feel as heat
5
4.0
Light you cannot see that often feels warm
4
4.2
A type of light we cannot see that warm things give off
Range of light waves longer than visible light that we feel as heat
Surface Forms
Morphology
The meaning ('the frequency of infrared radiation') is directly and transparently derived from combining 'infrared' (relating to wavelengths just below visible red) with 'frequency' (rate or number of cycles). This is a straightforward adjective + noun scientific composition with clear cross-linguistic parallels, so a B1 learner who knows both constituents would readily understand it.
Etymology
The term infrared frequency comes from the idea of light just below the color red: infrared literally means 'below red' and frequency means how often the light waves repeat. So it refers to invisible light waves just lower than red, which is why remote controls and special cameras use these frequencies.