1. The problem statement, all variables and given/known data It's a problem I'm having with my experiment. We set up a diode LASER through 2 polarizers, and changed one of the polarizers' angle with respect to the other, to demonstrate Malus's Law. We used some sort of photo detection device (which we were told uses the photoelectric effect to measure intensity of light) which was connected to an Oscilloscope which measured the change in potential difference over the detector. SOMEHOW we are expected to calculate the intensity of the photon beam from the potential difference measurements. 2. Relevant equations Well all I know is that the potential difference over the detector is directly proportional to the intensity of the photon beam passing through the 2 polarizers. 3. The attempt at a solution Read point # 2.