Comparing NIR (Near Infrared) and Visible Light
By Saam on Saturday, December 21 2013, 20:01 - Permalink
I have been playing around with IR (Infrared) Photography. That is taking pictures of light that is not visible to the human eye (so technically its not light, but rather electromagnetic energy). All digital cameras have a piece of silicon that is sensitive to light that allows us to capture images. However these silicon (CCD) chips are more sensitive that the human eye so they can see into the Ultraviolet and Infrared ranges as well.
So on my recent trip to Yosemite I took a video of Yosemite Falls in both IR (above 950 nm wavelength) and regular visible light. You can see the difference in this side by side comparison video. Technically IR is not red or purple in color, its colorless because we can't see it but the camera interpreted it with the purplish color you see.
By the way the waterfall starts as water at the top then becomes snow at the bottom, amazing no?