Answer
(a) $1.6\times 10^{15}photons/s$
(b) $3.3\times 10^{-19}N$
Work Step by Step
(a) We can find the number of photons per second as follows:
$n=\frac{Pt}{hf}$
We plug in the known values to obtain:
$n=\frac{(1.0\times 10^{-10}W)(1s)}{(6.63\times 10^{-34}J.s)(96\times 10^6Hz)}$
$n=1.6\times 10^{15}photons/s$
(b) We can find the required force as follows:
$F=\frac{P}{c}$
We plug in the known values to obtain:
$F=\frac{1.0\times 10^{-10}W}{3.3\times1 ^8m/s}$
$F=3.3\times 10^{-19}N$
