The stopping potential needed to halt photoelectrons depends on?

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1. The stopping potential needed to halt photoelectrons depends on?

Only the intensity of the incident light

The frequency of the incident light and the cathode material

Only the cathode material alone

Only the frequency of the incident light alone

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Stopping potential relates to an electron’s maximum kinetic energy, which depends on both the light’s frequency and the specific metal’s work function — but never on the light’s intensity.