Physics · Oct / Nov 2018 · Paper 11 · Question 21
5054Sound
What is the approximate value for \[ \frac{\text{speed of light in air}}{\text{speed of sound in air}} ? \]
- A10^2
- B10^4
- C10^6
- D10^8
As printed in the paper
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Correct answer: C. 10^6
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