About microscope~
1) Why should a low power objective, instead of a high power one , be used first when making an observation under the microscope?
2)Why should the body tube be raised, instead of lowering, when using the coarse adjustment knob to bring the image in focus?
3)For a temporary slide of cells, the observation should be done with the microscope in an upright position.Why?
You can answer one of them if you really don't know the answer of them all