Microscopy

Question 1

What is the purpose of the fine adjustment knob on a light microscope?

Answer 1

It’s used to focus the lens until a clear image of what’s on the slide appears.

Question 2

True or False?
Electron microscopes have a smaller magnification that light microscopes, but they have a higher resolution than light microscopes.

Answer 2

False
Electron microscopes have both a higher resolution and a higher magnification that light microscopes

Question 3

How has electron microscopy increased biologists’ understanding of cells?

Answer 3

Electron microscopes let us study cell in much finer detail than light microscopes.

Question 4

Study of onion cells: Explain why a drop of iodine onto the slide

Answer 4

Iodine is a stain this is used to highlight objects in the onion

Question 5

Use the equation: magnification = Image size / real size
A specimen is 100 µm wide. Calculate the width of the image of the specimen under a magnification of x 200.

Answer 5

Imagesize= 200 × 100μm
Image size= 20000μm