Silicon solar cells are popping up in lots of places these days – they’re powering traffic lights and security cameras, they’re clinging in neatly ordered arrays to rooftops, and they’ve even been spotted in all their sparkly blue splendor on the occasional backpack (where they are used to power mp3 players, fancy calculators, and cell phones). 

Image credit www.devicedaily.com
Here’s how solar cells work at the most basic level:  photons (units of light) hit the surface of the cells and the light energy is quickly absorbed by the semiconductor material.  The incoming energy knocks electrons loose from the silicon, and when that …

I assume you’re aquainted with acrylic already;  perhaps the two of you met while model-making in the wee hours of the night during architecture school, or maybe you’re wearing acrylic nails.  Could be you’re rocking an acrylic visor on your motorcycle helmet, or your exotic tropical fish collection swims in an acyrlic fish tank.  You love it because it’s lightweight, transparent, has good impact strength, doesn’t break into lethal shards, doesn’t yellow, lasts for 30 years, and never forgets to call.  But sometimes a person wants more than transparency.  Sometimes a person wants …