I typically listen to NPR in the morning from a clock radio next to my bed. There are days when just moving my body, even my arm or leg, is enough to cause interference with the radio to dramatically decrease the volume, or it appears as if I lost the radio station altogether. I know that my body acts like an antenna because, from experience with an oscilloscope probe, I can grab one end of the probe and amplify the AC signal coming from the overhead fluorescent lights in the physics lab room. So I am assuming that this is the same effect as my clock radio.
- How is this interference created? That is, how is my body acting like an antenna, causing interference to occur with my clock radio?
- I assume that this interference of my body is (i) size- and (ii) distance-dependent as well as (iii) frequency-dependent. Can someone explain the connection between these things?