Home Physics Electron, Photon, Photoelectric Effect and X-rays Photon and Photoelectric Effect Light of wavelength 4000 Å is incident on a …
Physics Electron, Photon, Photoelectric Effect and X-rays Photon and Photoelectric Effect MCQ (Single Correct)

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

A
4.58 eV
B
2.29 eV
C
1.14 eV
D
0.57 eV

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The correct answer is:
B

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