Wave Optics

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The work function of lithium is 2.3 eV. What does it mean? What is the relation between the work function ‘W’ and threshold wavelength ‘A’ of a metal?

Solution

The work function of lithium is 2.3 eV.
This means that to remove the outermost electron from the ground shell of a lithium atom, an energy of 2.3 eV is required.

The relation of work function (W) and wavelength (λ) is given as,

$W = hv$

i.e., $W = \frac{hc}{λ} .$

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Wave Optics

The work function of lithium is 2.3 eV. What does it mean? What is the relation between the work function ‘W’ and threshold wavelength ‘A’ of a metal?

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