Actually, it’s the number of seconds from the flash to the boom, not from the rumble to the boom, that tells you how far away the lightning strike was. In fact, the rumble followed by the boom doesn’t really make any sense.
Actually, it’s the number of seconds from the flash to the boom, not from the rumble to the boom, that tells you how far away the lightning strike was. In fact, the rumble followed by the boom doesn’t really make any sense.