lamp emits light at the power P $=60\mathrm{.}0$ W and at the wavelength $1-577$ nm$,$ and the emission is uniformly in all directions. $($a$)$At what rate are photons emitted by the lamp? $($b$)$ At what distance from the lamp will a totally absorbing screen absorb photons at the rate of $1\mathrm{.}00$ photon $/$cm$\text{'}$s$?($c$)$ What is the rate per square meter at which photons aresodium lamp emits light at the power P $=60\mathrm{.}0$ W and at the wavelength $1-577$ nm$,$ and the emission is uniformly in all directions. $($a$)$At what rate are photons emitted by the lamp? $($b$)$ At what distance from the lamp will a totally absorbing screen absorb photons