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AP EAMCET202422 May 2024Evening ShiftPhysicsDual Nature of MatterActual

Light of wavelength 4000 Å is incident on a sodium surface for which the threshold wavelength of photo electrons is 5420 Å . The work function of sodium is

Options

  1. A4.58 eV
  2. B2.29 eV
  3. C1.14 eV
  4. D0.57 eV

Correct answer

B. 2.29 eV

Step-by-step solution

= 4000 Å, ₀=5420 Å Work function, aligned ₀= 12400 ₀( in Å) eV & = 12400 5420 & =2.29 eV aligned

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