I'm planning to conduct an experiment involving electromagnetic waves (specifically radio waves) and the resistance imposed on them by different materials. It is my understanding that in order to do so, I should connect the transistor radio picking up the radio waves to an oscilloscope in order to measure the signal strength. However, I'm not sure how I would do this.
Though, I may be going about this all wrong, so any additional information would be greatly appreciated.
Best Answer
I would be less concerned with using the resistance of different materials for the reason of showing the power level of RF. You could build a simple crystal radio with a tank circuit to show resonance which is how you would receive the power of a radio wave to begin with. You could get creative and make a simple crystal radio where you replace the diode with a transistor, then use a second tank circuit to tune in a close by, strong station to bias the transistor. This will show the power of an RF signal. You would naturally do this in the broadcast band.