Why Lightning Comes Before Thunder

Speed Of Light Is Faster Than Sound:-

        In nature, a lightning flash and the associated thunder occur at almost the same time in a thunderstorm.  A person on the ground sees the lightning flash before hearing the thunder because light at a speed of around 300,000,000 meters per second travels much faster than sound which moves at 340 meters per second.  If one is 1,000 meters away from the thunderstorm, he/she would see the flash almost instantly after lightning occurs as it takes just a few microseconds, while the thunder arrives only after about 3 seconds (1,000 meters divided by 340 meters per second).