Boojho saw a cracker burst at night at a distance from his house. He heard the sound of the cracker a little later after seeing the cracker burst. Give reason for the delay in hearing the sound.
Boojho heard the sound of cracker after seeing the cracker because:
⇒ The speed of light is faster than sound.
Speed of sound in air = 330 m/s
Speed of light in air = 3 × 108 m/s
⇒ Thus, Boojho saw burst of cracker (light) first, then after some times, he heard the sound.