$2.$ A light bulb emits light with a frequency of $3\mathrm{.}5$x$1014$ Hz at a power of $5\mathrm{.}0$x$102$ Watts.a$.$ What is the wavelength of the light wave? $(0\mathrm{.}33$ points$)$b$.$ What are the peak value of the electric field and magnetic field at a distance of $3\mathrm{.}2$ m from the bulb, assuming a spherical propagation of the E&M waves? The area of a sphere is $4$mr$\text{'}.(0\mathrm{.}33$ points$)$c$.$ How much time does it take for the wave to travel from the bulb to someone standing $15$ m away?$(0\mathrm{.}33$ points$)$