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Dual Nature of Radiation and Matter question

2014 · Q134
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Dual Nature of Radiation and Matter question

2014 · Q134

NEETPhysicsDual Nature of Radiation and MatterMCQ+4 / −1
When the energy of the incident radiation is increased nby 20%, the kinetic energy of the photoelectrons emitted from a metal surface increased from 0.5 eV to 0.8 eV. The work function of the metal is
  1. A
    0.65 eV
  2. B
    1.0 eV
  3. C
    1.3 eV
  4. D
    1.5 eV
View written solutionFree

Correct answer: B

0.5 = E – ϕ\phi ϕ

⇒\Rightarrow⇒ 0.8 = 1.2 E – ϕ\phi ϕ

From above expressions, work function ϕ\phi ϕ = 1 eV

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