(4) Electrons are no longer ejected from a sample of metal whenever it is illuminated by light with wavelength greater than 344nm. (a) Based on the table below, what is the most likely metal being illuminated? (b) If the sample is illuminated by light with wavelength 48.3nm, what is the stopping potential? (c) In the event this sample of metal were replaced by a metal with a smaller work function, but still illuminated with light with 48.3nm, would the kinetic energy of the ejected electrons increase or decrease?
(4) Electrons are no longer ejected from a sample of metal whenever it is illuminated by light with wavelength greater than 344nm. (a) Based on the table below, what is the most likely metal being illuminated? (b) If the sample is illuminated by light with wavelength 48.3nm, what is the stopping potential? (c) In the event this sample of metal were replaced by a metal with a smaller work function, but still illuminated with light with 48.3nm, would the kinetic energy of the ejected electrons increase or decrease?
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Transcribed Image Text:(4) Electrons are no longer ejected from a sample of metal whenever it is illuminated by light
with wavelength greater than 344nm.
(a) Based on the table below, what is the most likely metal being illuminated?
(b) If the sample is illuminated by light with wavelength 48.3nm, what is the stopping
potential?
(c) In the event this sample of metal were replaced by a metal with a smaller work
function, but still illuminated with light with 48.3nm, would the kinetic energy of the ejected
electrons increase or decrease?
(d) What is the threshold frequency for cesium?
W (eV)
Atom
Cesium
2.1
Calcium
2.9
Uranium
3.6
Cadmium
4.07
Lead
4.14
Niobium
4.3
Iron
4.5
Соpper
Cobalt
4.7
Gold
5.11
Platinum
6.35
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