A light wave is incident normally on a glass slab of refractive index 1.5. If 4% of light gets reflected and the amplitude of the electric field of the incident light is 30 V/m , then the amplitude of the electric field for the wave propagating in the glass medium will be:
a. 30 V/m
b. 10 V/m
c. 24 V/m
d. 6 V/m