A graph regarding photoelectric effect is shown between the maximum kinetic energy of electrons and the frequency of the incident light on the basis of data as shown in the graph. The work function is ____ ev.

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answer is 4.

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Detailed Solution

From graph, $f_{0} = 10 \times 10^{14} H z = 10^{15} H z$
$h = \frac{8 \times 1.6 \times 10^{- 19}}{20 \times 10^{14}} = 6.4 \times 10^{- 34} J$
Work function, $W_{0} = h f_{0} = 4 e V$

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