ARPES

Let's imagine that you have a ball and you want to know what it's made of. Normally, you would look at it, touch it, and maybe even weigh it to figure out if it's plastic or rubber. But what if you had a tiny ball that you couldn't see with your eyes or touch with your hands? How would you find out what it's made of?

That's where ARPES comes in. ARPES stands for Angle-Resolved Photoemission Spectroscopy. It's a scientific tool that helps us figure out what things are made of, even if they're too small to see or touch.

Here's how it works: Imagine you have a tiny ball made of atoms. When light shines on the ball, it causes electrons inside the atoms to move around. ARPES detects these electrons and measures how they move in relation to the angle and energy of the light that hit them. This information tells us about the structure of the ball and what it's made of.

ARPES is used in many different fields of science, including physics, chemistry, and materials science. It helps scientists understand the properties of materials at an atomic level, which can be useful for developing new technologies and solving complex problems.

So the next time you see a tiny ball that you can't touch or see, just remember that ARPES can help us understand what it's made of and how it works.