Apparently dogs have a far higher flicker fusion threshold. So a light that might seem OK to you is like a disco stobe for your pooch. Also, if you take a phot

Apparently dogs have a far higher flicker fusion threshold. So a light that might seem OK to you is like a disco stobe for your pooch. Also, if you take a photovoltaic cel and hook it up to an audio jack, you can turn the unseen flicker in light into sound.