COMEDK · Physics · 27. Dual Nature of Matter
From the figure describing photoelectric effect, we may infer correctly that
- A \(\mathrm{Na}\) and \(\mathrm{Al}\) both have the same threshold frequency
- B Maximum kinetic energy for both the metals depends linearly on the frequency
- C the stopping potential are different for \(\mathrm{Na}\) and \(\mathrm{Al}\) for the same change in frequency
- D \(\mathrm{Al}\) is better photosensitive material than \(\mathrm{Na}\)
Answer & Solution
Correct Answer
(B) Maximum kinetic energy for both the metals depends linearly on the frequency
Step-by-step Solution
Detailed explanation
From Einstein's photoelectric equation: \(eV_s = h\nu - \Phi \Rightarrow V_s = \dfrac{h}{e}\nu - \dfrac{\Phi}{e}\) This is a linear equation in \(\nu\) with slope \(\dfrac{h}{e}\), which is universal (same for all metals). (1) Na and Al have different x-intercepts…
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