Light of wavelength 4000 overset texto mathop textA is incident on a sodium surface for which the threshold wavelength of photoelectron is 5420 overset texto mathop textA . The work function of sodium is

Question

Light of wavelength 4000 overset texto mathop textA is incident on a sodium surface for which the threshold wavelength of photoelectron is 5420 overset texto mathop textA . The work function of sodium is (A) 4.58 eV (B) 2.28 eV (C) 1.14eV (D) 0.57 eV

Tardigrade Admin · Accepted Answer

W0=(12375/λ 0( overset texto mathop textA )) =(12375/5420)=2.28 eV

Q. Light of wavelength 4000 $A o$ is incident on a sodium surface for which the threshold wavelength of photoelectron is 5420 $A o$ . The work function of sodium is

4.58 eV

2.28 eV

1.14eV

0.57 eV

$W_{0} = \frac{12375}{λ _{0} ( A o )}$ $= \frac{12375}{5420} = 2.28 e V$

Q. Light of wavelength 4000 Ao is incident on a sodium surface for which the threshold wavelength of photoelectron is 5420 Ao . The work function of sodium is