Calculate the work function that requires a 455 nm photon to eject an electron of a value 0.73 eV

W = 2 eV

Explanation:

Given that,

The wavelength of a photon = 455 nm

The kinetic energy of a photon, K = 0.73 eV

We need to find the work function of the electron. It can be solved using Einstein's equation such that,

E is the energy of the photon

So,

So, the work function of the metal is 2 eV.

0.11 m/s and 0.28 m/s should be correct

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