What is the main function of the coarse focus knob on a light microscope?

State the maximum resolution of a light microscope and explain what this means.

Explain why specimens must be cut very thin when preparing slides for light microscopy.

A student uses a microscope with a ×10 eyepiece and a ×40 objective. The cell image on their micrograph measures 12.0 mm. Calculate the actual size of the cell in μm.

A scientist is studying malaria parasites inside human red blood cells. Explain which type of microscope (light or electron) would be most suitable for observing the live behaviour of the parasites. Explain which type would be most suitable for studying the detailed structure of the parasites. Justify your answers by referring to advantages and limitations of each microscope.