Microscopes Flashcards
(23 cards)
What did Robert Hooke invent?
The world’s first microscope
Hooke’s design is still common in modern microscopes.
What did Hooke discover in 1665?
Plant cells
He observed a thin slice of cork.
What is the magnification power of Hooke’s microscope?
x30
This was limited due to poor quality glass lenses.
What is the maximum magnification of modern light microscopes?
Up to x1500
With resolutions down to 0.0001nm.
What is making an observation?
Looking carefully and in detail at an object.
What is the primary light source used in light microscopes?
Lamp.
What is the resolution of a light microscope?
Approximately 200 nm.
What are all living organisms made up of?
Cells.
What part of the microscope do you look through?
Eyepiece.
Fill in the blank: The part of the microscope that is closest to the specimen is the _______.
Objective lens.
What is the smallest distance between two points that can be seen as two points?
Resolution.
What is the formula for total magnification?
Eyepiece magnification x Objective lens magnification.
Calculate the total magnification if the eyepiece magnification is x10 and the objective lens magnification is x50.
500.
What should you use to draw microscope slides?
Pencil.
What should you avoid when drawing specimens?
Shading or colouring.
How should each circular diagram be sized?
About a third of a page in size.
What should always be recorded when observing cells?
Magnification, name of specimen, and date of observation.
What is the total magnification for an eyepiece of x40 and an objective lens of x20?
800.
What is the objective lens magnification if the total magnification is x200 and the eyepiece is x5?
40.
What are the parts of a microscope you need to label?
Eyepiece, arm, objective lens, stage, slide, mirror, base.
Describe the function of the focusing knobs in a microscope.
They are used to bring the object into focus.
What is the purpose of the stage in a microscope?
To hold the slide with the specimen.
What is the primary method for observing cells within a white flower petal?
Using a microscope to observe cells under magnification.
