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 theseSoccer ball, Iron, Sea cucumber, Pig, Wizard, Rose, Moose, Pilgrim, Secret code, Superhero, 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 #3339 Sasuke by Jean-Benoit Renaud


anonymous
anonymous
sketch #2309


anonymous
anonymous
sketch #5272


anonymous
anonymous
sketch #1545


anonymous
anonymous
sketch #2062


anonymous
anonymous
sketch #978


anonymous
anonymous
sketch #4749 Random Girl by Adellachamp Stand


anonymous
anonymous
sketch #3290 Calvin and Hobbes by অনন্ত জলিল


anonymous
anonymous
sketch #2025


anonymous
anonymous
sketch #1232 Dylan Thomas


anonymous
anonymous
sketch #1953 愛鼠繪


anonymous
anonymous
sketch #5286 Adventure Time by Manu Kp


anonymous
anonymous
sketch #3676 Sceptical horse by Koes Maung


sketchmaster
sketch #2627 Taz by sketchmaster


sketchmaster
sketch #2457 cool beans brother


anonymous
anonymous
sketch #3701 amazing Skull


anonymous
anonymous
sketch #3473 Finn by Luana Santos


anonymous
anonymous
sketch #5187


anonymous
anonymous
sketch #3581 Dante


anonymous
anonymous
sketch #4859


anonymous
anonymous
sketch #4646 Panda by Raimundo Santos


anonymous
anonymous
sketch #2892 Joker by Frank Aguiar Au


anonymous
anonymous
sketch #3410


anonymous
anonymous
sketch #4093 freefree


anonymous
anonymous
sketch #704


anonymous
anonymous
sketch #5438


anonymous
anonymous
sketch #4821 Johnny M. by Z Ionut Ady


anonymous
anonymous
sketch #3133 Skrillex by Asfa Sajid


Benjo Arellano
sketch #779 Gol D Roger

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