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UV rays

Splendid Rays and Skin Cancer

29 Mar 2022

Helios, the sun god in Greek mythology, rode a chariot across the sky, east to west, sunrise to sundown, year round, as dusk bestows silvery moonlight accompanied by stars that extend to infinity...

Light, Wavelengths, and Inactivating COVID-19

12 Jun 2020

Maybe you’ve read about specific wavelengths of ultraviolet (UV) light being used to sanitize objects and inactivate the SARS-CoV-2 virus. Or perhaps you’ve seen something about how certain...

Why is the Sky Blue? Or Better Yet, Why is the Ocean Blue?

31 Jan 2020

The sky is blue due to a phenomenon called Raleigh scattering. This scattering refers to the scattering of electromagnetic radiation (of which light is a form) by particles of a much smaller...

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