For a particular metallic surface the following observations were made in an…

PHYSICS · Multi-part · CBSE · Physics · Dual Nature of Radiation and Matter · Dual Nature of Radiation and Matter

Problem

For a particular metallic surface the following observations were made in an experiment:

Incident frequency $\nu$ (Hz)	Stopping potential $V_0$ (V)
$7.0\times10^{14}$	$1.24$
$1.10\times10^{15}$	$2.90$

Assuming the observations are exact. (a) Determine the threshold frequency

\nu_0

for the metal. (b) Hence find the work function in electron-volt and in joule. (c) Using the same data, calculate the numerical value of

h/e

(Planck’s constant per unit charge) and comment on its agreement with the accepted value.