That's a fascinating thought experiment, combining the Young's double-slit experiment with the photoelectric effect! Let's break down what would happen and what we could learn. Conceptual Setup: Young's Double Slits: We'd have a standard double-slit setup, creating an interference pattern of bright and dark fringes on a screen. Potassium Screen: Instead of a regular screen, we'd use a plate made of potassium, a metal known for its relatively low work function. Variable Light Source: We'd use a light source whose frequency (and thus color) can be smoothly varied from red to blue. Detection: We'd need a way to detect the emitted photoelectrons from the potassium plate, perhaps by measuring the current or using an electron detector. Expected Observations and Implications: Low-Frequency (Red) Light: If the red light's frequency is below potassium's work function, no photoelectrons will be emitted, regardless of the intensity of the lig...
