History
The trees remember: Sheepherders’ carvings preserved in the San Juan Mountains
As Hispanic sheepherders roamed the mountains, often alone for months at a time, they carved names, dates and drawings into the soft bark of aspen trees.
Optical Instruments: Crash Course Physics #41
Explore the world of physics, motion, and energy with Dr. Shini Somara.
Optical Instruments: Crash Course Physics #41
Season 1 Episode 41 | 9m 56s | CC
How do lenses work? How do they form images? Well, in order to understand how optics work, we have to understand the physics of light. In this episode of Crash Course Physics, Shini talks to us about optical instruments and how they make magnification possible.
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