Exam-style question
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What is the speed of light in a vacuum?.
- A.3 x 10^6 m/s
- B.3 x 10^8 m/s
- C.3 x 10^10 m/s
- D.3 x 10^12 m/s
Model answer
What a good answer should say
- 3 x 10^8 m/s
Explanation
Why this works
The speed of light in a vacuum is defined as 3 x 10^8 m/s, which is a fundamental constant in physics and is crucial for understanding electromagnetic wave behavior.
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