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Why does light bend when it enters glass?

Fermilab
816K subscribers
814K views 6 years ago
The motion of light depends crucially on the material in which it is traveling. When light passes from one medium to another, an unexpected thing happens: the direction of travel changes. There are many explanations for why this happens and many of those explanations are wrong. In this video, Fermilab’s Dr. Don Lincoln explains the real reason. Correction: Dr. Don is aware that the direction the plus and minus charges moved at 12:02 is backward. He apologizes. Related video:    • Why does light slow down in water?   ...more
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Why does light bend when it enters glass?
31KLikes
814,323Views
2019May 1
The motion of light depends crucially on the material in which it is traveling. When light passes from one medium to another, an unexpected thing happens: the direction of travel changes. There are many explanations for why this happens and many of those explanations are wrong. In this video, Fermilab’s Dr. Don Lincoln explains the real reason. Correction: Dr. Don is aware that the direction the plus and minus charges moved at 12:02 is backward. He apologizes. Related video:    • Why does light slow down in water?  

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Fermilab

816K subscribers