If threshold wavelength for sodium is then the work functi…

Physics Electron, Photon, Photoelectric Effect and X-rays Photon and Photoelectric Effect MCQ (Single Correct)

If threshold wavelength for sodium is then the work function will be

1.8 eV

2.5 eV

2.1 eV

1.4 eV

Text Solution

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The correct answer is:

Convert the threshold wavelength from Angstroms to meters:

Use the formula for work function:

Substitute the known values:

Calculate the work function in joules:

Convert the work function from joules to electron volts:

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