Can we see refraction of light in the air with our eyes? Can we see refraction of light in the air with our eyes?
I am asking that because every night I see that the light in the street moving little is that because of change in the air?
I do not mean Street light interference.
 A: Sure, that is what the wavy motion over a hot car is, and also the cause of mirror-like mirages on deserts and hot roads. Stars also twinkle due to the same effect. Not sure about street lights per se, but I'm sure there are combinations where air refraction of light would show up there also.
A: Another interesting way to see this, if you live or work where you can see a mountain range, is to train a telescope to some object on top of the mountain. Not only will you see the quivverring image you speak of, if your telescope mounts are stable and you don't adjust them, you will see that the object will move up and down in the telescope from day to day as the refractive index profile, and thus the "effective" Earth curvature (see the Wikipedia Article on Anomalous Propagation. Indeed, if the mountain range is far enough away, the object will shift right out of the field of view on some days. About 80km from where I live, there is a mountain range. Some days it looks distant and you can only just see the peaks. Other days it looks huge and you can see the bottoms of the mountains. I live in an area that has many atmospheric temperature inversions.
