The velocity of an electromagnetic wave through a medium which a permeability in free space 4π × 10-7 Hm-1 and permittivity in free space of 8.854 × 10-12 C2N-1m2 is
A. 2 × 108 ms-1
B. 3 × 108 ms-1
C. 2.25 × 108 ms-1
D. 1.5 × 108 ms-1
Answer:B
The velocity of an electromagnetic wave through a medium which a permeability in free space 4π × 10-7 Hm-1 and permittivity in free space of 8.854 × 10-12 C2N-1m2 is
A. 2 × 108 ms-1 B. 3 × 108 ms-1 C. 2.25 × 108 ms-1 D. 1.5 × 108 ms-1