ScienceCLASS 9CBSE
answered 27 Mar 2026Flash and thunder are produced simultaneously. But thunder is heard a few seconds after the flash is seen. Why?
A.VERIFIED ANSWERfact-checked by tutors
The speed of sound is 344 m/s, whereas the speed of light is 3 × 108 m/s. The speed of light is less when compared to that of light. Due to this reason, thunder takes more time to reach the Earth as compared to light speed, which is faster. Hence, lightning is seen before whenever we hear thunder.