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General Physics Science Fair Project

Color Filtering with Lasers

Color Filtering with Lasers | Science Fair Projects | STEM Projects
Let's explore the power of lasers and colored filters! We'll use a laser pointer, colored glass filters, and a solar cell to measure the power of the laser beam.


The hypothesis is that the colored glass will filter and block the beam of the laser pointer.

Method & Materials

You will need to set up a laser pointer, a holder for the laser pointer, colored glass filters, a watt-meter, and a solar cell. You will measure the power of the laser beam with the solar cell and record the results.
You will need a 1 watt red laser pointer, a 1 watt green laser pointer, a 1 watt blue laser pointer, a holder for the laser pointer, a red glass filter, a green glass filter, a blue glass filter, a watt-meter, a solar cell, and a 1-meter ruler.


The results showed that the colored glass filters did not have any significant impact on the power of the laser beam. It was also observed that the red laser beam emitted the greatest amount of power and the blue beam, the least amount of power.

Why do this project?

This science project is interesting because it explores the power of lasers and colored filters. It also shows how the color of the laser beam affects the power of the beam.

Also Consider

Consider repeating the experiment with other color laser pointers like yellow or orange. You could also try passing the laser through a beaker filled with colored solution.

Full project details

You can find additional information and details for this science fair project here. Have fun exploring!

Related videos

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