The green flash is a rare, brief optical event of green, yellow, and sometimes blue that colors the horizon, occurring at sunrise or sunset most often in the western U.S. Refraction and dispersion ...

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Watch as the Broncos joined Campos at Lumberg Elementary School to teach students about light refraction and dispersion during an International Day of Light STEM pep rally. Take a look back at the ...

With heat, humidity, and often heavy pollution, unusual optical phenomena are not uncommon in parts of Asia. But what was recently observed in China, in Chengdu near Sichuan, was truly extraordinary: ...

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