system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does the FM radio signal get better by moving one foot forward?

Driving a Camry with a broken antenna (snapped in half). Listening to music, and the audio quality goes in and out. If I'm stopped somewhere, it might be fuzzy, but if I move up a foot, the quality gets perfect. If I move up one more foot, it gets fuzzy again. If I move up one foot again, the quality gets clear again. Is the signal from the radio tower that pointed?
gpt
This is called Multipath Fading.  Radio waves are traveling all around you and bounce off things.  The waves are a complex version of a sine wave.  Because the waves bounce off things before they get to you (reflections) as well as getting to you directly, many waves of the same frequency will arrive at your antenna at the same time.  Because they've taken different paths to get to you, they arrive at different places in the wave.  Think of the wave as values between -10 and +10, gently rising and falling in a regular wave between those values.  Because of these reflections, some waves are arriving "sooner" than others, meaning at a point in time you'll have a combination of all different values -- -10, -2.234 -1, 0, +1, 5.34, etc.  If, due to these waves combining at your antenna, they sum up to zero (or close to zero), you'll lose your signal.  Moving a few feet changes the path that all the waves took to get to you, so the sum of all the values will no longer be zero and you'll get your jamz.