1.1 - Scientific Technology Flashcards
- “The Father of Biology”
- one of the first GREEK philosophers who used the scientific method
Aristotle
Invented the first compound microscope by combining two convex lenses within a tube
Hans and Zacharias Janssen
A ______ microscope uses more than one lens to magnify
Compound
______ discovered the cellular composition of cork and introduce the word ______* to science. His three-lens system has TWO lenses in the ocular part.
*inspired by the rooms of monks in a monastery
Robert Hooke
Cell
______ was the first person to observe the movement of ______
He improved magnification of microscopes by ______ lenses
Anton van Leeuwenhoek
Living cells
Adding/using
Magnification formula
Magnification = (objective lens) (eyepiece magnification)
Micrometres / microns (μm) are ______ of a millimetre (mm)
So, 1 mm is ______ μm
1/1000
1000
The ______ is the entire area that you see when you look through a microscope. To compare we usually measure their ______.
Field of view (FOV)
Diameters
Since the FOV ______ in size in direct proportion to the ______ of the magnification, we can calculate the size of other fields of view.
Decreases
Increase
Formula to find unknown magnification or FOV diameter
High power field diameter / low power field diameter= low power magnification / high power magnification
Formula to find the actual size of an object in reality
Field diameter / # of objects estimated to fit across the field of view’s diameter
Scale formula for actual size:diagram size
Scale = Diagram size of objects / actual size
Magnification of low power objective lens with ocular lens power of 10X
Low power objective lens = 4X
Magnification = 40X
Magnification of medium power objective lens with ocular lens power of 10X
Medium power objective lens = 10X
Magnification = 100X
Magnification of high power objective lens with ocular lens power of 10X
High power objective lens = 40X
Magnification = 400X
