When a beam of photons of intensity falls on a platinum surface of area and work function

PHYSICS · Subjective · A Level · Physics · Particles and radiation · Particles and radiation

Problem

When a beam of

10.6\ \text{eV}

photons of intensity

2.0\ \text{W m}^{-2}

falls on a platinum surface of area

1.0 \times 10^{-4}\ \text{m}^2

and work function

5.6\ \text{eV}

0.53\%

of the incident photons eject photoelectrons. Find the number of photoelectrons emitted per second and their minimum and maximum energies in

\text{eV}

. Take

1\ \text{eV} = 1.6 \times 10^{-19}\ \text{J}