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AP EAMCET202419 May 2024Evening ShiftPhysicsDual Nature of MatterActual

The longest wavelength of light that can initiate photo electric effect in the metal of work function 9 eV is

Options

  1. A1.37 10⁻⁷ ~m
  2. B1.5 10⁻⁷ ~m
  3. C3.7 10⁻⁷ ~m
  4. D4 10⁻⁷ ~m

Correct answer

A. 1.37 10⁻⁷ ~m

Step-by-step solution

for metal, ₀=9 e^v _ o = h _ c _ o _ o = 1240 ~eV - nm 9 ~eV =1.37 10⁻⁷ ~m

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