Photochemical logic gate

A photochemical logic gate is like a tool that helps computers make decisions. It uses light instead of electricity to send signals to the computer. The way it works is that light means "yes" and no light means "no", so the computer will make decisions based on this. For example, if your computer was doing a math problem and one part said "do you have enough apples to bake a pie?", the photochemical logic gate would tell the computer whether there were enough apples by turning on a light if there were enough and not turning on a light if there were not enough.