Imagine shining a torch through two small slits cut into a piece of card. You’d expect two neat lines of light on the wall behind, right? But when scientists did this with tiny particles like electrons, they got something completely unexpected. Instead of acting like little balls, the electrons created patterns like ripples in water. That strange pattern became one of the most important discoveries in science.

This is the story of the double-slit experiment explained in the simplest way possible. It’s a mystery that puzzled even the smartest minds, like Albert Einstein. Get ready to dive into the weird world of quantum physics, where particles behave like waves, and observing something might actually change what happens.