14:38

Diffraction and interference of light | Physics | Khan Academy

29:24

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

14:13

Electromagnetic waves | Physics | Khan Academy

11:10

Refraction of Light

14:18

Blackbody radiation | Physics | Khan Academy

13:57

Neil deGrasse Tyson Explains the Electromagnetic Spectrum

13:29

Electric current | Physics | Khan Academy

11:24

Refraction of Light