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Question about 1000 nm

  • From: "David N. Horn" <dh@xxxxxxxxxxxxx>
  • Subject: Question about 1000 nm
  • Date: Mon, 14 Dec 1998 10:36:50 -0500
Al,

1000 nm is a measure of the wavelength, i.e. color of light.
nm stands for nano meters. 1 nm = 1/1000,000,000 meters, i.e. 1.0E-9m,
or 10^(-9).
For reference, visible light falls roughly in the range of 400 nm
(violet) to 700 nm (red). 1000 nm is in the infrared range.
Light-sensitive things (eyes, light meters, film, CCDs, etc) have
different sensitivity at different wavelengths, therefore any
characterization of light sensitivity needs to specify the wavelength.

Dave Horn
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