Maximum kinetic energy of an electron in the photoelectric effect (26-1)

Question 1 of 4

Question

Frequency of the light used to illuminate the material

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Review

Equation 26-1 tells us that that a graph of $K_{\mathrm{max}}$ as a function of the light frequency $f$ should be a straight line of slope $h$ (see Figure 26-3). Since kinetic energy can never be negative, Equation 26-1 also tells us that electrons will be emitted only if $hf - \Phi_0 > 0$ .