In vacuum, Light travels at a speed of

Q. In vacuum, Light travels at a speed of

A.            3.0 × 107 m s-1

B.            30 × 108 m s-1

C.            3.0 × 10-8 m s-1

D.            3.0 × 108 m s-1

Answer: 3.0 × 108 m s-1