Originally posted by: Regs
Originally posted by: DrPizza
At that distance, I don't think your body is going to perceive the "shortly after" - your senses are going to indicate simultaneous.
The sound comes from the rapid heating of the air from the lightning. So I would only assume the sound comes directly after the flash.
Yep, but you're not going to perceive it. I'll elaborate. The rapid heating of the air is just that: rapid. Rapid as in a few millionths of a second (this, I had to google; I wasn't sure of the magnitude, but knew it was less than 1/1000 of a second) So, while it's not exactly simultaneous, you'll never be able to perceive the difference. There is, however, a more significant difference: the speed of light is roughly a million times faster than the speed of sound. It takes thunder roughly 5 seconds to be heard a mile away. 33 meters would take 1/10th of a second. (Speed of sound is 331 meters per second at STP - this I didn't have to google.) 33 meters is more than 100 feet; I don't think that on that jet anyone was more than 100 feet away, thus the difference between the flash and the sound would be less than 1/10th of a second. If two events unexpectedly occur involving two different senses 1/10th of a second apart, I don't think you're going to be able to differentiate which happened first.
Incidentally, something new I learned that amazed me:
The longest lightning bolt measured to date was 118 miles long!!! (may be longer by now.)