光は横波で、進行方向に垂直ないろいろな角度の面で振動しています。偏光板は、そのなかからひとつの角度の面に振動する光だけを通過させます。偏光板を通して見える不思議な光の現象を楽しむことができます。 Light travels in waves that move along just one plane each?back and forth to the left and right, or straight up and down, for instance. These waves come together in a beam of light. But when we use a polarized surface to filter that light, it only lets through the waves that are traveling along one certain plane. Here you can see the strange effects of polarized light on what we see.