Hi all, I was at some event last week and we had tea candles on each table. At one point in the evening, I noticed that the wax in one of the candles had gone entirely molten, and was also completely transparent. The wax was originally opaque. Now, I understand how transparency works, it's when photons cannot easily excite any of the electrons in orbit around a nucleus (say, Carbon Diamond for example) and if they can excite some of the electrons, then the photons get absorbed and do not pass through the substance (Carbon Graphite). Now logic would dictate that in a liquid, there are far more free electrons than in a solid? And come to think of it, this also applies to several other elements (water), when the liquid state is transparent and the solid state is opaque. Could anyone explain to me what is going?