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    Question

    What is the speed of light in a vacuum?

    A 3 × 10⁸ m/s Correct Answer Incorrect Answer
    B 1.5 × 10⁸ m/s Correct Answer Incorrect Answer
    C 2.5 × 10⁸ m/s Correct Answer Incorrect Answer
    D 3.5 × 10⁸ m/s Correct Answer Incorrect Answer

    Solution

    Light travels at an incredible speed of 3 × 10⁸ m/s in a vacuum. This is the universal constant for electromagnetic waves. It decreases slightly in mediums like air or water.

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