Answer: All reflect some sunlight, but snow is the best reflector. The random nature of the matrix of ice crystals within snow causes snow to be an excellent reflector of sunlight. In fact, snow reflects light so effectively that skiers often get sun-burned from the sunlight reflected off the snow.

Ice is also a good reflector, but the crystals in ice are much more uniform in their orientation, which allows more light to travel through the ice than through snow.