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Title: What is the threshold frequency of radiation needed to cause the photoelectric effect with this metal? Post by: datoledo88 on Oct 22, 2012 The minimum energy needed to eject an electron from the surface of a certain type of metal is 6.4×10-19 J. What is the threshold frequency of radiation needed to cause the photoelectric effect with this metal?
Title: What is the threshold frequency of radiation needed to cause the photoelectric effect with this metal? Post by: rockywix702 on Oct 22, 2012 You can use U = h*f where U is the energy of a photon, h is Planck's constant, and f is the frequency of the photon.
This gives f = U/h = 965.9THz |