With 26 illustrations and photographs. This short little book was written by one of the pioneers of Yosemite National Park, Galen Clark. In 1857 Clark was the first white person to view the Mariposa……続きを見る
The easy way to shed light on Optics
In general terms, optics is the science of light. More specifically, optics is a branch of physics that describes the behavior and properties of light?including ……続きを見る
