Here is an amazing video of a power line that fell on a tree. It’s live and is burning the tree for a minute and emitting a loud whine then just after the minute mark there’s an impressive ZAP, ZAP, ZAP, BOOM, BOOM, BOOM as something gives and it explodes. It’s pretty wild, I’ve only heard zap sounds like that in movies. If I had to explain it, I’d say “The darn thing shorted out”, but I’m wondering about the real science behind it.
What caused the loud whine in the first minute of the video?
What caused the three loud (and bright) zap sounds?
What caused the two or three explosions further down the line?
I’ve shorted out wires and made a spark and a “pop,” is the whine like that except a million pops per second making it sound like a continuous whine? I’m guessing that the wire melted and the zap sound is from electricity jumping from one side of the wire to the other but, even if that’s right (a big if), I can’t explain why it causes the zap sound.
So, can anyone walk us through what is happening in the video?