Michelson–Morley experiment

Imagine you're driving a car at night with your headlights on. You notice the beam of your car's headlights seems to bend slightly as you speed up or slow down. This bending could be because of the air around you, but you're wondering if there's something else affecting the light.

The Michelson-Morley experiment aimed to see if light's speed changed with Earth's motion through a mysterious "aether." If light behaved differently in various directions, it would suggest the presence of this aether. However, the experiment found no difference, suggesting light's speed is consistent regardless of direction or Earth's motion.