TS EAMCET · Physics · Dual Nature of Matter
When a photosensitive material is illuminated by photons of energy 3.1 eV, the stopping potential of the photoelectrons is 1.7 V. When the same photosensitive material is illuminated by photons of energy 2.5 eV, the stopping potential of the photoelectrons is
- A 1.8 V
- B 1.4 V
- C 1.1 V
- D 1.3 V
Answer & Solution
Correct Answer
(C) 1.1 V
Step-by-step Solution
Detailed explanation
\( \phi = E_1 - eV_{s1} \) \( \phi = 3.1 \, \text{eV} - 1.7 \, \text{eV} = 1.4 \, \text{eV} \) \( eV_{s2} = E_2 - \phi \) \( eV_{s2} = 2.5 \, \text{eV} - 1.4 \, \text{eV} = 1.1 \, \text{eV} \) \( V_{s2} = 1.1 \, \text{V} \)
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