This apparatus uses a mercury lamp to generate a narrowband, fixed-size monochromatic beam via a bandpass filter and aperture. This beam irradiates the phototube, generating an electric current that is detected by a microcurrent amplifier. It enables the study of how light wavelength, aperture size, and intensity interact, verifying Einstein's photoelectric effect theory. Data collection supports both manual reading from meters and automated acquisition through a PASCO 850 Universal Interface with Capstone software. Given the need for extensive data across wavelengths and apertures, this solution is highly recommended. The apparatus itself maintains an experimental error of less than 5%, even with traditional methods.
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