Scientists get the best toys. Gordon Watts posts a photo of an optics experiment at Life as a physicist. Another picture from the lab itself.
Also, via Cosmic Variance, an experiment on polarized light that may be evidence for the existence of axions. See also Nanoscale Views (Doug Natelson) and Uncertain Principles (Chad Orzel). The paper is Zavattini et al. Experimental observation of optical rotation generated in vacuum.