Question

The ratio of amplitude of electric field to the amplitude of the magnetic field associated with an electromagnetic wave propagating in glass \((n=1.5)\) is :

• A. \(3\times10^{8}\,\text{ms}^{-1}\)
• B. \(2\times10^{8}\,\text{ms}^{-1}\)
• C. \(3.3\times10^{-9}\,\text{ms}^{-1}\)
• D. \(5\times10^{-9}\,\text{ms}^{-1}\)

Hint:

Always remember: \[ \frac{E_0}{B_0}=c \] in vacuum and \[ \frac{E_0}{B_0}=v=\frac{c}{n} \] inside a medium of refractive index \(n\).

Answer 1

The Correct Option is B