State photomultiplier tube sensitive to the largest portion

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Reference no: EM13182739

A) Ultraviolet light with a wavelength of 200nm is incident upon gold surface in a vacuum chamber. What is teh wavelength of the most energetic electrons that are ejected from the surface?

Useful InformationL

Li 2.3eV

Ca 2.87 eV

Al 4.28 eV

Au 5.1ev

B) A photomultiplier tube detects photons by amplifying the current generated by the photoelectric effect. Which metal, lithium, calcium, aluminum or gold would you choose if you were trying to make a photomultiplier tube sensitive to the largest portion of the visible spectrum?

Reference no: EM13182739

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