I’m learning. I was told to post pictures n ask questions. So, here are some pictures of two 1989 pennies. I found them at a yard sale. In a small wooden chest. While looking at the tails side of coins. I can see Lincoln’s outline.
That is perfectly normal. The Lincoln Memorial statue has always been visible on the reverse of the Lincoln Memorial Cent.
As stated above, the statue is part of the normal reverse. If, however, you think you can see the image of Lincoln's head from the obverse, sometimes there can be a clash of dies when no planchet is between them and the opposite images are transferred to the next number of planchets, or there can be ghosted images transferred. I cannot see either of those two on the reverse of your coins.
It’s called something like Indirect Die Transfer. The stresses of the metal flowing into the obverse die erodes the reverse die and creates the ghost image on the reverse
Welcome to CT @Charon1849. As for terminology, there have been rather thorough lists posted here in the past, so you can use the "search" feature in the upper right corner to find those posts. When I first started posting here, I too became confused by terms and acronyms, so had to make up my own list, or refer to others. Your second coin is damaged by finger prints, so I hope you know to handle coins only by their edge, or wear gloves. Also, when posting photos, you are given two options after the upload; thumbnail, and Full Image. Clicking on Full Image will post the photo large and allow the viewer an easier enlarged view. Good luck.