Question by : What is the minimum frequency (and longest wavelength) of radiation for which the detector registers a respons?
In a demonstration of the photoelectric effect, suppose that a minimum energy of 5.2×10^−19J (3.2 eV ) is required to dislodge an electron from a metal surface.
Best answer:
Answer by arbylee
h = J/v
xHz = (5.2*10^-19 J)/(6.626*10^34 J/s)
wavelength = speed/frequency
speed of light= 8.00*10^8m/s
I dont have my calculator but just plug these equations in and u have ur answer
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lambda (0 microns) =1.2395/phi(eV)
lambda(0) =1.2395/3.2 =0.3873 Umeters
in a medium where C = 3e8 meters/sec
f = c/lambda = 3e8/3.873e-7= 773e12= 773 terahz