How does light 'know' the shortest path?

Jul 9, 2026Channel
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Veritasium
Veritasium

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Video Details

Published4 days ago
Duration1:16
Video IDh1YeIE0vEIs
Languageen
CategoryEducation
PrivacyPublic
Made for KidsNo
Video TypeRegular Video

Performance Metrics

Views478.7K
Likes17.8K
Comments637
Engagement Rate3.84%
Likes per 100 views3.71
Comments per 1K views1.33

Description

Light is the fastest thing in the universe. In order to be this fast it always needs to take the shortest path (as it's speed cannot change). So how does it always know what the shortest path is?

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