Microscopy

Descripción

AS level Biology Fichas sobre Microscopy, creado por Nova Kozma el 17/03/2017.
Nova Kozma
Fichas por Nova Kozma, actualizado hace más de 1 año
Nova Kozma
Creado por Nova Kozma hace más de 7 años
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What do microscopes allow us to see that we couldn't see before? Unicellular organisms or small organisms in detail, and how their structures relate to their functions
What can we see with light microscopes? Living or dead organisms, prepared specimens
How many lenses are on a compound light microscope? 2- the objective lens (placed near the specimen) and the eyepiece lens (the one you look through)
What is chromatic abberation? An unfocused, fringed image produced by wavelengths of different angles when a lens is unable to bring the wavelengths to the same focal pane
What are the names of the bigger, less accurate focusing knob and the smaller, more accurate focusing knob? The coarse-focusing knob and fine-focusing knob
What is another (better) name for a red blood cell? An erythrocyte
What is another (better) name for a white blood cell? A leucocyte
What is the calculation for magnification? Magnification = size of image/actual size of object
What is the calculation for actual size of an object? Actual size = size of image/magnification
What is the calculation for size of image? Size of image = actual size x magnification
Calculate how many nanometres are in 2778 centimetres (standard form) 2.778 x 10^10
Explain why eyepiece graticules do not have units Because the objective lens can change the magnification of the image, so the eyepiece units would be different
What are the two types of electron microscopes? TEM- Transmission electron microscope, and SEM- Scanning electron microscope
What is the difference between a lymphocyte and a leukocyte?
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