What is Tan δ?

Tan δ is like measuring how wiggly something gets when you push it a little.

Imagine you're playing on a swing. When you just gently nudge it, it sways back and forth smoothly, that's normal behavior. But if the swing is old or rusty, it might sway more slowly or even start shaking side to side, that’s like being wiggly.

Now, think of Tan δ as a way to tell how wiggly something is when you give it a little push. It helps us know if something is working well or if it's starting to get tired or worn out.

When you push something, like the swing, it moves in two ways:

• One direction is the smooth, main movement (like going forward and backward).
• The other is the wiggly side-to-side shake.

Tan δ measures how much of that wiggly part there is compared to the smooth movement. If the wiggly part is small, the swing moves nicely, if it's big, you know the swing might need a little love!