A plane monochromatic electro-magnetic wave is incident normally on air-glass interface. The refractive index of glass relative to air is 1.5. The fraction of incident energy that gets transmitted is
1
\( \frac{1}{5} \)
2
\( \frac{4}{5} \)
3
\( \frac{1}{25} \)
4
\( \frac{24}{25} \)
5
Question Not Attempted