Física

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Guillermo
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Física

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A hot metal filament emits electrons. The number of electrons emitted per second and unit area of the metal surface
depends on the temperature of the filament and the work function of the metal. The electrons can be absorbed by an anode
and measured as an emission current. The relationship between the saturation current Is and the absolute temperature T
is given by Richardson–Dushman’s law:
Is = constant ×T2e− kBT
where is the work function of the metal.
A series of measurements on a molybdenum cathode resulted in the following measurements:
Is(A) 1.31 4.11 12.00 32.90 85.18
T (K): 1500 1550 1600 1650 1700
Determine the work function of Mo graphically and expressed in eV.
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