Which of the graphs shown below does not represent the relationship between incident light and the electron ejected from metal surface ?
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The Correct Option is B
Solution and Explanation
Option (1): K.E. vs energy of light is zero up to the work function, then rises linearly: correct.
Option (2): K.E. vs frequency drawn as a straight line through the origin: incorrect, because no electron is emitted below the threshold frequency \(\nu_0\); the line must start at \(\nu_0\) on the frequency axis.
Option (3): K.E. vs intensity is constant (K.E. depends on frequency, not intensity): correct.
Option (4): number of electrons vs frequency is zero below \(\nu_0\) and constant (for fixed intensity) above it: acceptable.
Answer: (2) the graph of K.E. of electrons vs frequency starting from the origin
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