Q15. Electromagnetic waves travel in a medium with speed of $1.5 \times 10 ^ { 8 } \mathrm {~m} \mathrm {~s} ^ { - 1 }$. The relative permeability of the medium is 2.0 . The relative permittivity will be: (1) 2 (2) 4 (3) 5 (4) 1
Q15. Electromagnetic waves travel in a medium with speed of $1.5 \times 10 ^ { 8 } \mathrm {~m} \mathrm {~s} ^ { - 1 }$. The relative permeability of the medium is 2.0 . The relative permittivity will be:\\
(1) 2\\
(2) 4\\
(3) 5\\
(4) 1