Modern Physics and the Study of the Photoelectric Effect

Abstract

The variations of photoelectric current with light intensity are discussed in this study. The photoelectric effect is affected by a number of factors, including light frequency, intensity, material type, light energy, and potential difference. Even if the photoelectric effect occurs, the photoelectric current produced as a result of it may vary if the intensity of light is changed, provided that the frequency of illumination is greater than the threshold frequency. An experiment was carried out to determine the effect of changing light intensity on photoelectric effect while keeping the other factors constant. The effect was observed by varying the distance between the light source and the photocell and recording the readings on a Microammeter. The results were drawn using correlation and graphical analysis. According to the correlation analysis, there is a significant positive relationship between photoelectric current and light intensity. A positive linear relationship was also revealed by the graphical analysis.