The figure below shows photoelectric effect data for three different metals. The

Question

The figure below shows photoelectric effect data for three different metals. The vertical axis is the maximum kinetic energy of a photoelectron (this is the kinetic energy of the electron when it is just emitted from the cathode), and the horizontal axis is the frequency of the incident light. (a) The horizontal (frequency)-axis intercepts (when the maximum KE is zero) represent the cutoff (or threshold) frequencies or the metals the work functions of the metals Planck's constant the cutoff (or threshold) wavelengths of the metals (b) The units for the slopes of these lines is (b) The units for the slopes of these lines is J J/s J - s (c) The slopes of these lines represent the cutoff (or threshold) wavelengths of the metals the cutoff (or threshold) frequencies of the metals the work functions of the metals Planck's constant (d) The vertical axis intercepts (where the frequency is zero) represent (in magnitude) Planck's constant the cutoff (or threshold) wavelengths of the metals the cutoff (or threshold) frequencies of the metals the work functions of the metals

Explanation / Answer

a) the cut-off frequencies of the metals
b)J·s
c.)Planck's constant
d.)work functions of the metals

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