Question

work function of sodium metal is 2.35 electron volt what is the maximum wavelength of light which causes emission of electrons from the metal surface . what will be the maximum energy of photon electrons of radiation 1000*A falls on the metal surface​

Answer 1

Answer:

The approximate value of longest wavelength (in angstrom) which can result in the emission of a photo-electron from the surface of sodium atom is 544 nm.

Explanation:

The work function is defined as minimum energy required to knock out an electron from the surface of the metal.

h= Planck constant

c = Speed of light

= Threshold frequency

= Longest wavelength

The work function of sodium metal =2.28 eV=

The approximate value of longest wavelength (in angstrom) which can result in the emission of a photo-electron from the surface of sodium atom is 544 nm.

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