4pcs optical lenses

Used for a reading lesson about light and the class loved using them. Good quality!

These prisms are quality glass and work well for doing optical tricks and effects. The edges are chamfered a little so they aren't sharp. You can indeed get a rainbow but it just takes a while to get the right angles with sunlight, and you want to aim the rainbow in a dark area for contrast. Also, the prisms are packaged well and include a cleaning cloth. You'll need it for fingerprints.

Scam! Just pieces of glass. They do nothing!

Bought for my students to refract light. Worked great!

I bought these as a gift for Our Grandchildren. Then really like to play with them and explain to their friends how these break down white light into different colors. A good science project to explain this and how the sun shines on a rain shower to make a rainbow.

I got one long triangular prism when I ordered a set of four smaller triangular prisms. They did a good job of almost getting the order correct. Gladly, one long prism will work for the purpose I ordered the four smaller ones, but probably read the orders before filling them.

Order for my photography class. They were handled by over 80 students. They held up well. Rainbows were created. They are not over the top huge rainbows, but ones we could look at and photograph. The average size of the rainbow we created was 2 inches on white paper. However one student managed to create a much large rainbow on the white board of a distance of at least 4 feet away via sun coming through our classroom windows.

These are nice, they come in a nice little box with a little cloth and have the nice factor. They are readily broken though and they don't put off much more of a rainbow in comparison to the class sets. Class sets are much more durable and a lot cheaper.