5. Start from the region in space that contain a time-changing electric flux, and determine the shape of the magnetic field that these regions will produce 6. Draw an appropriate surface, and then use Amp`ere law to relate the line integral of the magnetic field around its border to the time changing electric flux that passes through it. 7. From this, find the magnitude of the new magnetic field that is induced by the electric field that was induced by the original magnetic field

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.