(a) Light of wavelength 300 nm is incident on a metal that has a work function of...

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(a) Light of wavelength 300 nm is incident on a metal that has a work function of 1.4 eV. What is the maximum speed of the emitted electrons? 

(b) If light of wavelength 800 nm is incident on a metal that has a work function of 1.6 eV, are any electrons ejected? 

(c) How would your answers to parts (a) and (b) change if the light intensity were doubled?

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