Do you see where the “visible light” rainbow section is in the electromagnetic spectrum image below? This small area shows the light that you can actually see with your eyeballs. Note that the “rainbow of colors” that make up our entire visible world only make up a small part of all the light, from 400-700 nm (nanometers, or 10-9.
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Oh gosh – I am ao sorry for the typos! I’ve re-written this section so it’s accurate and added a bit about UVC. Thank you for your eagle eye!
UVA is between 315-400nm, and UVB is 280-315nm, UVC is 100-280nm.
We’re wondering about UVA vs UVB – the text above states that “UVA is high energy” and “UVB is low-energy.” However, elsewhere we’ve learned that longer wavelengths have a lower frequency, and lower energy. Since UVA waves are longer than UVB waves, shouldn’t that mean that UVA is lower energy than UVB?