A sample of silver (with work function 4.52 eV) is exposed to an ultraviolet light source (lamba
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Question:
A sample of silver (with work function 4.52 eV) is exposed to an ultraviolet light source (lamba = 200 nm), which results in the ejection of photoelectrons. What changes will be observed if:
a) the silver is replaced with cerium (work function 2.90 eV)
b) half of the ultraviolet light from the source is blocked
c) the ultraviolet source is replaced with a red laser that emits the same number of photons per unit time as the original light source
Choice are: less energetic photoelectrons, more photoelectrons ejected, more energic photoelectrons, no change, no photoelectrons admitted, fewer photoelectrons ejected.
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