Ncert solutions

Ncert solutions

Grade 8

Sound | Exercise

Question 13

Q 13) 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 why?

Solution 13:

Lightning is seen earlier and thunder is heard later because the speed of sound is 330 m/s and the speed of light is 300,000,000 m/s. Light travels faster than a sound.Thus, light from the lightning reaches first to you. The sound from the lightning takes longer to reach and hence heard later.

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subject-cta

Question 13

Q 13) 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 why?

Solution 13:

Lightning is seen earlier and thunder is heard later because the speed of sound is 330 m/s and the speed of light is 300,000,000 m/s. Light travels faster than a sound.Thus, light from the lightning reaches first to you. The sound from the lightning takes longer to reach and hence heard later.

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subject-cta
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