CC2.1. Two Prisms
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![Two prisms arranged to produce white light](https://gss.lawrencehallofscience.org/wp-content/uploads/sites/3/2021/05/CC02-prism1.png)
If you can borrow two prisms, you might try splitting a beam of light into its different colors, then combining the light again into a single beam—just as Isaac Newton did more than 300 years ago.
- Use the Sun or an electric light bulb for your source of light.
- Put a slit in a sheet of paper to create a single beam of light.
- Align the prism and then the second prism to create your spectrum and then turn the spectrum back into white light.