Explain why, the flash of lightning reaches us first and the sound of thunder is heard a little later.

Academic Physics NCERT Class 9

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.

Speed of light is nearly $3,00,000\ km/second$ while speed of sound is $343\ m/s$.

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Updated on: 10-Oct-2022

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