BrainStuff

Whether the topic is popcorn or particle physics, you can count on BrainStuff to explore -- and explain -- the everyday science in the world around us.

https://www.iheart.com/podcast/brainstuff-20922291/

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How Red Eyes in Photographs Work

[transcript]


The flash of a camera is bright enough to cause a reflection off the human retina -- the red we see in these photos comes from the blood vessels in the eye. Learn more about red eyes and cameras in this HowStuffWorks podcast.

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 July 14, 2008  2m