I browse the ir led strips at www.ledlightmake.com, Here there are two problems about LED infrared.as follower.

**What is LED infrared wavelength of 940nm in meters?
Wavelength Refers to the nanometer, Is not equal to the number of meters. but if  had to Unit conversion, one nanometer is 10 ^ -9 meters (one-billionth of a meter), or 10 ^ -6 mm (100 millionth of a millimeter). Like centimeters, decimeter and metre.They are measured  units for length.
That is the same question we talked about before.(Please see: The light perceived by the human eye is measured in units called lumen-hours.) The equivalent of 4 times the atomic size,is smaller than the length of the individual bacterium.

**Would you please briefly introduce Infrared spectroscopy?
With A beam of different wavelengths infrared rays irradiation tothe molecular species, some of the infrared radiation of a specific wavelength is absorbed, recording the relationship curve between  transmittancepercentage of infrared and
wavelengths relationship.