The frequency f wavelength l and wave speed v are related by the equation. The blue gelatin which is actually cyan absorbs red light but not blue or green so the red beam isnt visible. Multiply the distance between the spots on the chocolate bar by 2 and then by 2450000000 which 245 gigahertz expressed as hertz.
Procedure Dependent Variable Bibliography A device that produces a visible laser beam.
Easy Method for Measuring the Speed of Light In a transparent tupperware make a batch of clear gelatin like jell-o and let it harden. Fall off your chair as your result is astoundingly close to 299792458 metres per second - the speed of light. This change in speed causes the direction of the beam to refract or bend. Results You can measure the speed of light using an inexpensive laser pointer with a protractor and gelatin.