Coitak 6 inch Optical Glass Triangular Prism, Crystal Triangular Prism for Teaching Light Spectrum Physics, Photo Photography Prism Tool

I put them in the window and The light moves around the room as the Earth rotate.

After visiting the National Museum of the American Indian, beautiful BTW, I was so taken by the rainbow projection.Every day this thing projects a moving rainbow across my apartment. It has to be set in the right place. In my case a bright window. It works. I wanted to include a photo but the sun has set.

It looks good, but one of the sides has an imperfection. It's slightly curved, and a bump is visible from the top side of the prism.The glass is nice and clear.There's no sharp edges.Overall good.

Bought this as a surprise gift for my 9 Y.o. grandson who has special needs. I think he will enjoy it, at last for a little while. In full sun the spectrum is quite clear.

This prism was damaged when I received it. How can I exchange for a quality product?

I bought this to teach my granddaughter about light and prisms. What little girl does not like bright and shiny things. It came in a nice box as packaging and for storage. Very sheer and smooth and the perfect size.

Item is a great value. Crystal clear lens, nice color spectrum when used as classic prism. Look forward to using it in various ways. Comes in a nice box, fast shipping.

Came in with broken glass edges potential to cut fingers

Excelente! El cristal es adecuado y el tamaño el descrito. El empaque es muy sencillo pero suficiente para protegerlo. Trae un trapo para limpiar.