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Blocking Radio Waves

Blocking Radio Waves | Science Fair Projects | STEM Projects
Ever wonder what materials block radio waves the most? Join us in this experiment to find out! We'll be testing different materials to see which one causes the most interference for remote control devices.


The hypothesis is that the cement (brick) will give the least interference and that the glass will have the most interference.

Method & Materials

You will place a remote control car's receiver back wheels on the edge of a basketball court, have someone hold the remote control transmitter outside the door of the gymnasium, and then place different materials between the transmitter and receiver to see which one causes the most interference.
You will need a stopwatch, a 27 MHz remote control car, 24 AA alkaline batteries, 6 9v batteries, cement (brick), wood, and glass.


The results of the experiment were surprising. The wood offered the most interference, and then the glass and the brick offered the least interference to the radio waves. This was different than the hypothesis, which was that the cement (brick) would give the least interference and that the glass would have the most interference.

Why do this project?

This science project is interesting because it helps us understand which materials can cause interference to remote control devices.

Also Consider

Experiment variations to consider include testing different materials, such as metal or plastic, and testing different frequencies of radio waves.

Full project details

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

Related video

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