Tag Archives: rainbow

How to make a rainbow on paper

Want to get pleasure from natural rainbow color? without waiting for rain. By knowing science you can. In this home experiment we are going to apply same principles of real rainbow to form rainbow colors from sunlight on paper.

Required Materials

  • Small size mirror

  • Frying Pan (or any other similar to it)

  • White paper and Sunlight

how-to-make

  1. Fill the frying pan with water
  2. clean the surface of the mirror and place it it in the pan at an angle below the surface level of water.
  3. Place your pan on sunlight so that sunlight falls on the surface of the mirror
  4. Hold a white paper above the pan to catch the reflected rays from mirror

If your setup is correct than you should be able to watch rainbow colors on paper. If not, try to change the angle of the mirror in the pan (see the setup in the figure below)

paper-rainbow-setup

I have taken some picture on my paper and hand check them below.

rainbow-on-paper

rainbow-on-hand

Watch the video of Rainbow on paper below

explanation

When you shine sunlight on mirror, light, first enters into water and refracts (bends). Since sunlight is combination of visible colors each color has its own frequency and wavelength  so these colors refracts at different angles in this way sunlight is broken into its components that are reflected from mirror on the paper.

try-this

  • Try using large mirror in the water tub or swimming pool and note the results