O Level Physics MCQs – Certification Test 744

Introduction to Light Quiz (Question 744) – App & e-Book Download

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MCQ 744: In vacuum, Light travels at a speed of:

3.0 × 10⁷ m s^-1
30 × 10⁸ m s^-1
3.0 × 10^-8 m s^-1
3.0 × 10⁸ m s^-1

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