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4. Measure the cutoff frequency. Determine the lowest frequency of light that still produces photoelectrons from the sodium cathode. You can use the slider or

4. Measure the cutoff frequency. Determine the lowest frequency of light that still produces photoelectrons from the sodium cathode. You can use the slider or type in specific wavelengths for a finer control. Record your result below.

Electrode material	Cutoff frequency (Hz)	Work function (eV) (calculated)	Work function (eV) (theoretical)
Sodium	5.70 x10¹⁴

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