meterm1 decimeterdm10 −1 m0,1 m1/10 m centimetercm10 −2 m0,01 m1/100 m millimetermm10 −3 m0,001 m1/1 000 m micrometer (or micron)μm10 −6 m0, m1/ m nanometernm10 −9 m0, m1/ m ÅngströmÅ10 −10 m0, m 1/ m UNIT OF MEASUREMENT IN BIOLOGY
LIGHT MICROSCOPE 1.ocular lens, or eyepiece 2.objective turret 3.objective lenses 4.coarse adjustment knob 5.fine adjustment knob 6.object holder or stage 7.mirror or light (illuminator) 8.diaphragm and condenser
DIFFERENT TYPES OF MICROSCOPES Light MicroscopyElectron Microscopy
Trasmission Electron Microscopy
Scanning Electron Microscopy
Light and Fluorescence Microscopy
Light Microscopy
Fluorescence Microscopy
Phase Contrast Microscopy
Steps for the preparation of Biological samples to be observed 1) Fixation Inclusion into hard compounds Catting into thin slices Staining 1) Fresh and alive cells Can be directly observed under Phase contrast microscopy