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In a photoelectric experiment visible/white light (λ = 400 to 700nm) falls on a metal with work function of? = 2.48eV.
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a) What is the range of wavelengths (λmin, λmax) of visible light that ejects electrons from the metal?
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b) What is the maximum speed of photoelectrons?
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c) What is the stopping potential?
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d) If a 15 mW laser of λ = 450 nm is used, how many photons are emitted each second?
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