抛物线的光学性质:所有从焦点�出的光经过反射会平行射�远方。怎么用平面几何证明? 知乎 Template




You need a modern browser try chrome, to view this.

Background image: Hide Show

View Larger Image Image Credit: zhihu.com






Try and sketch some of theseLime, Breakfast, Quirt, Bell, Woodpecker, Donut, Trombone, Shark, Vardo, Poppy, view more ideas


please wait, the page is loading...

More Sketches

Take a peek at some of the sketches created by our users, are you a sketchite?

anonymous
anonymous
sketch #2856 Merry Christmas from Melany Campano Laos Komlós László


anonymous
anonymous
sketch #4264 oh yeah


anonymous
anonymous
sketch #5149 Daenerys Targaryen by Jorge Valero


anonymous
anonymous
sketch #1846 zay


anonymous
anonymous
sketch #2554


anonymous
anonymous
sketch #5061


anonymous
anonymous
sketch #5181


anonymous
anonymous
sketch #1927


anonymous
anonymous
sketch #5086 Lion by Z Ionut Ady


anonymous
anonymous
sketch #4796


anonymous
anonymous
sketch #4921


Sarah Nila
sketch #3483 Ginger


anonymous
anonymous
sketch #5228 Rin & Len by Mark Phillips


anonymous
anonymous
sketch #5134


anonymous
anonymous
sketch #1853 scribble


Zay Lin
sketch #2087 zay lin


Милен Тревата
sketch #2771 Naruto by Милен Тревата


anonymous
anonymous
sketch #3716


anonymous
anonymous
sketch #600


anonymous
anonymous
sketch #5018 Owl by Komlós László


anonymous
anonymous
sketch #2308


anonymous
anonymous
sketch #4368


anonymous
anonymous
sketch #4983


anonymous
anonymous
sketch #3296

tomski抛物线的光学性质:所有从焦点�出的光经过反射会平行射�远方。怎么用平面几何证明? 知乎 coloring