Titanium work function 694 x 10-19 j and silicon work, Ask an Expert

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Titanium (work function = 6.94 x 10^-19 J) and silicon (work function = 7.24 x 10^-19 J) surfaces are irradiated with UV radiation with a wavelength of 250 nm. Which surface emits electrons with the longer wavelength? What is the wavelength of the electrons emitted by the titanium surface?

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