Electromagnetic waves travelling in a medium having relative permeability μr = 1.3 and relative permittivity Er = 2.14. The speed of electromagnetic waves in medium must be
A. 1.8 × 108 ms-1
B. 1.8 × 104ms1
C. 1.8 × 106ms1
D. 1.8 × 10² ms-1
Answer:A
Electromagnetic waves travelling in a medium having relative permeability μr = 1.3 and relative permittivity Er = 2.14. The speed of electromagnetic waves in medium must be
A. 1.8 × 108 ms-1 B. 1.8 × 104ms1 C. 1.8 × 106ms1 D. 1.8 × 10² ms-1