The work function caesium 1.9ev. Calculate1. if wavelength ofincident light 4000 angstromfind kinetic energy of photo electrons2.threshhold frequency3 stoppingpotential.

The work function caesium 1.9ev. Calculate1. if wavelength ofinciden

1.	The work function caesium 1.9ev. Calculate1. if wavelength ofincident light 4000 angstromfind kinetic energy of photo electrons2.threshhold frequency3 stoppingpotential.
Answer» tion:The work function (W)=1.9Ev=1.9×1.6×10^(-19)Joule ( converting EV into joule)incident wavelength=4000×10^(-10)meterwe know Ke=hc/wavelength-w(h is PLANKS constant and c is VELOCITY of light)ke=1.91×10^(-19)j=1.19evweknow,work function=h×threshold frequency1.9×e/h=ff=4.5×10^14 hzfor stopping potentialke=ev1.19e=e×vso v=1.19

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The work function caesium 1.9ev. Calculate1. if wavelength ofincident light 4000 angstromfind kinetic energy of photo electrons2.threshhold frequency3 stoppingpotential.​

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The work function caesium 1.9ev. Calculate1. if wavelength ofincident light 4000 angstromfind kinetic energy of photo electrons2.threshhold frequency3 stoppingpotential.