BSF HC RO RM Practice Questions - BSF Head Constable (Radio Operator Radio Mechanic) Written Examination Exam

The speed of light in vacuum is approximately:

3 × 10⁶ m/s 3 × 10¹⁰ m/s 3 × 10⁸ m/s 3 × 10⁵ m/s

Correct Answer:

3 × 10⁸ m/s

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