Light: Crash Course Astronomy #24
11:21
Distances: Crash Course Astronomy #25
12:05
The origin of Electromagnetic waves, and why they behave as they do
15:15
Deep Time: Crash Course Astronomy #45
15:10
Why Does Light Exist? What is Its Purpose?
4:38
The Science of Light and Color for Kids: Rainbows and the Electromagnetic Spectrum - FreeSchool
12:32
Death and Afterlife Across Religions: Crash Course Religions #17
15:01
What would we see at the speed of light?
13:23