Get premium membership and access revision papers with marking schemes, video lessons and live classes.

Processing. Please wait.

(a) State the function of a mirror in a light microscope.
(b) Give one reason why the coarse adjustment knob should not be used to lower the high power objective.

Answer Text:
a)- To reflect light through condenser to the stage to illuminate the specimen.
b)- High power objective lens is long and can crush the lens and the slide on the stage.
- Images move in and out of focus too quickly therefore it’s difficult to precisely adjust the focus.
- Can destroy the specimen.