Lightning and thunder take place in the sky at the same time and at the same distance from us. Lightning is seen earlier and thunder is heard later. Can you explain?


Speed of light is 3 x 10 8 m/s.

Speed of sound is 340 m/s.


Since speed of light is greater than speed of sound , lightning travels faster than thunder.


Hence, even though lightening and thunder takes place at the same time, lightning is seen earlier than thunder can be heard.

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.