Circle TRUE or FALSE for each of the following statements about the photoelectric effect. Justify each answer in 1–2 sentences:
The cutoff frequency depends on the type of metal: TRUE / FALSE
The saturation level for the photoelectric current depends on the number of incident photons impinging on the surface per unit time: TRUE / FALSE
The stopping potential can take on positive values for some metals: TRUE / FALSE
The stopping potential for the photoelectrons is zero at the cutoff wavelength for the incident photons: TRUE / FALSE
The intensity of the incident light has no effect on the photoelectric effect: TRUE / FALSE