How does light 'know' the shortest path?
Veritasium Jul 9, 2026
- 4.3M
- views
- 141.9K
- likes
- 2.6K
- comments
- 1m 16s
- length
Tags 22 tags, 335/500 characters
- veritasium
- science
- physics
- least action
- lifeguard
- math
- quantum mechanics
- Johann Bernoulli
- Isaac Newton
- principle of least action
- quantum
- problem of fastest descent
- Snell’s Law
- Pierre Louis Maupertuis
- Fermat’s principle
- Leonhard Euler
- Joseph-Louis Lagrange
- brachistochrone
- light
- electrons
- black body radiation
- The Double Slit Experiment
Thumbnails
Open a size to view or save it.
