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Speed of Light Experiment with Gelatin and a Laser!

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It doesn’t take expensive or sophisticated equipment to carry out a speed of light experiment at home or in the classroom. You can measure the speed of light with nothing but a laser, a protractor and a slab of gelatin, is inexpensive and surprisingly accurate!

Grade Range:

45-60 Minutes


Classroom Safe Laser Pointer or Laser Blox (red or green), Clear Gelatin, 360 degree protractor

NGSS Connections

Ps4.A: Electromagnetic Radiation

  • Use mathematical representations to support a claim regarding relationships among the frequency, wavelength and speed of waves traveling in various media. (HS-PS4-1)