Here is a reflected rainbow created by rays of sunlight shining on powder of thermoplastic road marking paint. The white pigments are mainly titanium dioxide (TiO2), zinc oxide (ZnO) and lithopone (ZnS + BaSO4). I call it powderbow.
Here is a reflected rainbow created by rays of sunlight shining on concrete wall surface. I call it concretebow.
Here is a reflected rainbow created by rays of sunlight shining on asphalt road surface which is wet with oil spill. I call it asphaltbow.
