Physics, 10.01.2020 14:31 shinyelish6
The following table lists the work functions of a few commonmetals, measured in electron volts.
metal \phi\,({\rm ev})
cesium 1.9
potassium 2.2
sodium 2.3
lithium 2.5
calcium 3.2
copper 4.5
silver 4.7
platinum 5.6
using these data, answer the following questions about thephotoelectric effect.
part a
light with a wavelength of 190 \rm nm is incident on a metal surface. themost energetic electrons emitted from the surface are measured tohave 4.0 \rm ev of kinetic energy. which of the metalsin the table is the surface most likely to be made of?
cesium
potassium
sodium
lithium
calcium
copper
silver
platinum
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The following table lists the work functions of a few commonmetals, measured in electron volts.
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