This is only observable with a light microscope. There are many advantages to using the SEM instead of a light microscope. The term "rhabdoid" was used due to its similarity with rhabdomyosarcoma under the light microscope. The slide is placed under a compound light microscope for sperm observation. Occasionally a light microscope may be needed. Unstained cells cannot be seen with a light microscope. This is when thin slices of mortar are examined by a transmitted light microscope. Karyotypes describe the number of chromosomes, and what they look like under a light microscope. When stained, neutrophils have a segmented nucleus and pink/orange cytoplasm under light microscope.