1. The problem statement, all variables and given/known data Use Max Planck's quantum theory to explain the following behavior of photoelectrons. i) Low-intensity light does not release any photoelectrons. What will happen if the light is made brighter? Explain your reasoning. ii) Low-intensity light releases photoelectrons. What will happen if the light is made brighter? Explain your reasoning. iii) Low-intensity light does not release any photoelectrons. What will happen if the frequency of the light is gradually increased? Explain your reasoning. 2. Relevant equations 3. The attempt at a solution i) If low-intensity light does not release any photoelectrons and light is made brighter, nothing noteworthy would happen. The reason for this is because the intensity, or brightness, is only a quantity of the rate at which the photons strike the surface. In addition, providing extra photons per second does not aid in releasing extra electrons, since each single photon does not have adequate energy to do this on its own. Also, metal can emit photoelectrons as long as the frequency of light is above a specific frequency, which is known as threshold frequency. As a result, since no photoelectrons are released, nothing significant will occur since the frequency is below the threshold frequency. ii) If low-intensity light releases photoelectrons and light is made brighter, frequency is above the threshold frequency which means each photon will have sufficient energy to generate photoelectrons. Additionally, increasing the intensity or brightness, will increase the number of photons, which will increase the number of photoelectrons. Conversely, the maximum kinetic energy of each photoelectron will not be affected by the larger number of photons. As a result, increasing the brightness of the light will increase current in the circuit. iii) If low-intensity light does not release any photoelectrons, it must mean that the frequency of the light is under the threshold frequency. As frequency progressively increases, the kinetic energy increases. It will eventually go over the threshold frequency which is the minimum frequency to release photoelectrons and will then start releasing photoelectrons. Subsequently continuing to increase the frequency over the threshold would not increase the current and the current will be the same. I was wondering if someone could review my answers. I feel I might be missing something as this portion of the unit was challenging for me to understand.