View Single Post
Nov22-12, 03:43 AM
P: 6
Hello all,

I'm not all too familiar with the electromagnetic spectrum, nor generally with physics but there is something that keeps me up. I learned, and also read now everywhere that visible light (to humans) lies in the wavelength range of about 400-700 nm. No I have a science book here with a picture of the EM spectrum with a scale for the wavelengths of all the different types of EM radiation and on this scale, visible light is marked at the range of Ám. However, in the text below it says of course that it lies in the nm range. Now it's the same here which gives me the slight suspicion that it's not the scales but me who's not getting it right here. Could someone please fill me in on that?

Thanks a lot in advance
Phys.Org News Partner Physics news on
Step lightly: All-optical transistor triggered by single photon promises advances in quantum applications
The unifying framework of symmetry reveals properties of a broad range of physical systems
What time is it in the universe?