Monochromatic light of wavelength is incident simultaneously on metals P and Q whose…

PHYSICS · Single correct · CBSE · Physics · Dual Nature of Radiation and Matter · Dual Nature of Radiation and Matter

Problem

Monochromatic light of wavelength

300\,\text{nm}

is incident simultaneously on metals P and Q whose work functions are

4.0\,\text{eV}

and

2.5\,\text{eV}

respectively. Which of the following statements is correct? (a) Both emit;

K_{\max}

for P

\approx1.63\,\text{eV}

and for Q

\approx0.13\,\text{eV}

(b) Only Q emits;

K_{\max}\approx1.63\,\text{eV}

K_{\max}

for P

\approx0.13\,\text{eV}

and for Q

\approx1.63\,\text{eV}

(d) Both emit;

K_{\max}

for P

\approx0\,\text{eV}

and for Q

\approx1.63\,\text{eV}