Why do rainbows bend?
51266
Why is rainbow always circular?
86796
Why do waves diffract?
125379
Do rainbows have ultraviolet bands and infrared bands?
83045
How can noodles (the lines that connect nodes) be changed from straight to curved lines?
27825
Bending of light - photon's inertia instead of mass
103305
Why does electromagnetic refraction happen?
68369
Why don't spinning tops fall over?
67346
Why exactly does diffraction occur?
78114
Why is the radius of curvature = 1/(curvature)?
147919
How does this optical illusion work?
94233
Why are images formed?
112961
Why does water pouring from a glass sometimes travel down the side of the glass?
15768
Why does subsurf modifier cause weird deformation at the end of a cylinder?
104989
What causes refraction of visible light?
136667
Why is the sky *uniformly* blue?
74658
Why are springs shaped the way they are?
42639
Why does a balloon spiral in the air instead of moving in a straight line?