Light of energy per photon falls on a sodium surface whose work function is

PHYSICS · Single correct · A Level · Physics · Particles and radiation · Particles and radiation

Problem

Light of energy

4.1\,\text{eV}

per photon falls on a sodium surface whose work function is

2.3\,\text{eV}

. What is the maximum kinetic energy of the emitted photo-electrons? (a)

6.4\,\text{eV}

(b)

4.1\,\text{eV}

(c)

1.8\,\text{eV}

(d)

2.3\,\text{eV}