Spherical mirrors, radius of curvature & focal length

20:25
Spherical Mirrors

29:24
But why would light "slow down"? | Visualizing Feynman's lecture on the refractive index

18:13
Convex and Concave Lenses

22:43
How to Design the Perfect Shaped Wheel for Any Given Road

33:37
Something Strange Happens When You Trust Quantum Mechanics

19:52
I Never Understood How Curved Time Creates Gravity… Until Now!

12:37
Trump Shamelessly Shills for Tesla, Hurls More Tariffs at Canada & Stock Market Suffers Bigly

28:33