Squeezed vacuum

Squeezed vacuum is a special type of light that can be made in a laboratory. Imagine you have a toy flashlight and you try to make the light beam smaller by pointing it at a wall. The light beam gets wider and wider on the wall. This happens because light is made up of little particles called photons that move around in all directions.

Now imagine you have a special tool that can control the way these photons move. When you use this tool, some photons move faster and others move slower. This makes the light beam look like it's been squeezed in some places and stretched out in others.

Scientists can use this special tool to make a squeezed vacuum. This is like a toy flashlight, but instead of a beam of light, it's a beam of squeezed photons. This squeezed vacuum can be used to make really sensitive tools, like a microscope that can see tiny objects or a telescope that can detect faint stars. It's like having a superpower to see things that are too small or too far away for us to see normally!