Shadows

The video explores the behavior of light, including refraction and reflection, and how shadows are formed. It explains the concepts of umbra and penumbra, and how the size of shadows changes with distance. The video also discusses the phenomenon of solar eclipses, where the moon casts a shadow on Earth, creating regions of umbra and penumbra. Viewers are cautioned against looking directly at an eclipse to avoid eye damage.

What new insight or understanding did you gain from this video?