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NEET

Exam: NEET
Subject: Physics
Chapter: Dual Nature of Matter

NEET · Physics · Dual Nature of Matter

The graph of kinetic energy of photoelectron versus frequency of...

The graph of kinetic energy of photoelectron versus frequency of incident radiation is shown for two metals

M

and

N

. We may definitely conclude
The graph of kinetic energy of photoelectron versus frequency of incident radiation is shown for two metals M and N .

The graph of kinetic energy of photoelectron versus frequency of incident radiation is shown for two metals M and N .

Options

Awork function of $M>$ work function of $N$
Bwork function of $M <$ work function of $N$
Cwork function of $M=$ work function of $N$
Dat the threshold frequency of $M$ the kinetic energy of the photoelectron emitted by $M$ is more than that emitted by $N$

Correct answer

A. work function of $M>$ work function of $N$

Step-by-step solution

Work function of a metal,

\begin{aligned}W &=h v_{0} \\ \text{ where, }h &=\text{ Planck's constant }\\ v_{0} &=\text{ threshold frequency. } \end{aligned}

As, the threshold frequency of metal

M

is more than that of metal

N

, so work function of

M

is more than that of

N

, while their kinetic energies are equal.

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