In a photoelectric experiment visible/white light (λ = 400 to 700nm) falls on a metal with work function of? = 2.48eV. a) What is the range of wavelengths (λmin, λmax) of visible light that ejects electrons from the metal? b) What is the maximum speed of photoelectrons? c) What is the stopping potential?

In a photoelectric experiment visible/white light (λ = 400 to 700nm) falls on a metal with work function of? = 2.48eV. a) What is the range of wavelengths (λmin, λmax) of visible light that ejects electrons from the metal? b) What is the maximum speed of photoelectrons? c) What is the stopping potential?

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Question

In a photoelectric experiment visible/white light (λ = 400 to 700nm) falls on a metal with work function of? = 2.48eV.

a) What is the range of wavelengths (λmin, λmax) of visible light that ejects electrons from the metal?
b) What is the maximum speed of photoelectrons?
c) What is the stopping potential?
d) If a 15 mW laser of λ = 450 nm is used, how many photons are emitted each second?

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