From what I can remember, TEM (transmission electron microscope) shows:
- Only 2D images (unlike SEM)
- Shows the inside of a cell (unlike SEM)
- Shows small organelles of a cell (unlike SEM and OM [optical/light microscope])
- Only used for dead cells due to vacuum, so images of a living organism/parts of it will be from an OM
And that’s all I can remember from last year relating to what you can see in TEM images, although there are other stuff you should know such as pros and cons. You should try to use exercise books to find these sort of answers. Kerboodle really helps.