Before we can understand radio frequency ablation or RFA, we need a crash course in wave physics. Energy moves in a wave, it's measured in frequency, how quickly it moves up and down. High frequency waves like Superman's x-ray vision move very quickly and that's able to penetrate most matter, however due to this frequency, they're likely to cause damage as they collide with molecules and disrupt the atomic balance. Low frequency waves like radio waves move very slowly and do not disturb the atomic balance of matter they pass through.