It can be shown that the radial distance of a light ray travelling along the z axiz of an optical fiber is described by the following equiation. d2r/dz2=(1/nr)*(dn/dr)
for the case where the index of refraction n=n0(1-ar2) and ar2,,1 find a solution of the differential equiation for r(z).

Which statement correctly describes the current in a circuit that is made up of any two resistors connected in parallel with a battery? a. the current in the battery and in each resistor is the same b. the current the battery equals to the sum of the currents in the resistors c.the current in the battery is less than the current in either resistor d. the current in the battery equals to the product of the currents in the resistors