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Rainbows in your room

Create a rainbow and bend light with this glass prism. Put the prism in your window with direct sunlight, move it to bend the light, and create beautiful rainbows in your room!

How does it work? When sunlight passes through a glass prism, it gets bent or refracted. Each wavelength of light bends at a slightly different angle, so the beam is spread out as it passes through the prism to be displayed on the other side as a spectrum of colours. The spreading out of the beam of light in this way is known as dispersion.

For your chance to win a glass prism from More 2 Science, enter the competition on page 38 of your latest Double Helix magazine, issue 57.

 Glass prism more2science logo