TS EAMCET · Physics · Dual Nature of Matter
When the energy of incident radiation is increased by \(20 \%\), the kinetic energy of the photoelectrons emitted from a metal surface increased from \(0.5 \mathrm{eV}\) to \(0.8 \mathrm{eV}\). The work function of the metal is
- A \(0.65 \mathrm{eV}\)
- B \(1.0 \mathrm{eV}\)
- C \(1.3 \mathrm{eV}\)
- D \(1.5 \mathrm{eV}\)
Answer & Solution
Correct Answer
(B) \(1.0 \mathrm{eV}\)
Step-by-step Solution
Detailed explanation
According to Einstein's photoelectric equation, \(E_K=E-\phi_0\) where, \(E_K=\) kinetic energy, \(E=\) energy of incident photon and \(\quad \phi_0=\) work function of metal surface. \(\Rightarrow \quad E=E_K+\phi_0\) \(\ldots\) (i) When energy of incident photon is increased…
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