Light of wavelength (380 mathrm{~nm}) strikes the metal target in Figure 34.47. As long as the potential

Question:

Light of wavelength $380 \mathrm{~nm}$ strikes the metal target in Figure 34.47. As long as the potential difference $V_{\mathrm{CT}}$ between the target and the collector is no greater than $+1.2 \mathrm{~V}$, there is a current in the circuit. Determine the longest wavelength of light that can eject electrons from this metal.

Data from Figure 34.47