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Water — Science STD 6 — Question

CBSE BoardEnglish MediumSTD 6ScienceWater1 Mark
MCQ
Why do we always see a lightning before we hear thunder?
  • A
    Because lightning occurs first.
  • ✓
    Because light travels faster than sound.
  • C
    Because thunder occurs late.
  • D
    Because sound travels fester than light.
✓

Answer

Correct option: B.
Because light travels faster than sound.
The speed of light $(3\times108\frac{\text{m}}{\text{s}})$ is more than speed of sound $332\frac{\text{m}}{\text{s}}$ in air.
So, we can see lightning before we hear thunder.

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