Refraction

refraction

[ ri-frak-shuh n ]

noun

Physics. the change of direction of a ray of light, sound, heat, or the like, in passing obliquely from one medium into another in which its wave velocity is different.

I captured a male, Ruby-throated Hummingbird at a feeder, but not without the effect of refraction. You can see the bird directly at the lower left side of the feeder. You can see the refracted image of him in the hour glass shaped glass vessel which contains the clear nectar.

Pretty cool!