This photo (hi-res version) shows light diffracting around a pinhead (see experimental setup). Note the spot of light in the center of the pattern--it's called Poisson's spot, and it shows unmistakably that light bent around the pinhead. To learn more, see this Buffalo State University webpage.
(This feature was updated on July 10, 2013.)
Image:
photo credit: UMASS-Amherst Physics Lecture Support
