Double-Slit Experiment Explained: What It Reveals About Reality

What would you expect to see if light or tiny objects passed through two ordinary openings in a card? Most people would predict two main bright regions on a screen, yet a famous quantum experiment can produce a striped pattern that needs a different explanation. This lesson asks why the result is surprising and what it reveals about the behaviour of very small things. A simple torch-through-card comparison helps us begin, but it cannot by itself reproduce the full experiment.