(Answered) A monochromatic source emitting photons at 250 nm shines

Engineering

A monochromatic source emitting photons at 250 nm shines with equal intensity on a zinc electrode (threshold n =1.04 x1015 Hz) and a sodium electrode (threshold n = 5.51 x1014 Hz).

Which of the following statements is true?

A) Electrons are ejected from the zinc surface but not the sodium surface

B) More electrons are ejected from the zinc surface than the sodium surface

C) More electrons are ejected from the sodium surface than the zinc surface

D) The electrons leaving the zinc surface are moving faster

E) The electrons leaving the sodium surface are moving faster

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