

Electron Microscopy
Presentation
•
Science
•
11th Grade
•
Practice Problem
•
Medium
John Galera
Used 3+ times
FREE Resource
21 Slides • 14 Questions
1
Electron Microscopy
2nd of September 2020
2
Larcopyle butschlii
3
Poll
Which of the shown picture depicts a clearer image?
Larcopyle butschlii under SEM (B)
Larcopyle butschlii under LM (B')
4
Open Ended
What makes Larcopyle butschlii under SEM clearer than the other?
5
Radiolarian
6
Multiple Choice
Which of the following phrases describes "Resolution"?
ability to distinguish between 2 different points
the number of times greater that an image is than the actual object
the number of pixels the screen has
7
8
"The maximum resolution of a light microscope is 20 nm."
What does this mean?
9
Which specimen image is resolved?
Choose carefully!
10
Poll
Which one is resolved?
Left Image
Right Image
11
"The maximum resolution of a light microscope is 20 nm."
What if the the two objects are closer together than 20 nm, what happens to the images?
12
How is resolution linked with the nature of light?
13
14
Multiple Choice
Which of the following wavelengths of light waves is best in viewing the specimen under a light microscope?
400 nm
700 nm
450 nm
15
16
Let's try check your knowledge on the visible light spectrum!
Ready?
17
Multiple Choice
All wavelengths of visible light spectrum are moving at the same speed but different frequency.
TRUE
FALSE
18
Multiple Choice
The human eye can distinguish between the different wavelengths of visible light spectrum.
TRUE
FALSE
19
Look at Figure 1.12 on page 11, CB.
How does the wavelength of light affect resolution?
20
Open Ended
How does the wavelength of light affect resolution?
21
Multiple Choice
The human eye can distinguish between the different wavelengths of visible light spectrum.
TRUE
FALSE
22
Wavelength and Resolution
1/2 of the light wave's wavelength = resolution limit
23
What do you mean by that?
"If an object is smaller than 1/2 of the light wave's wavelength, it cannot be seen separately from nearby objects."
24
25
Study the next figure.
26
27
Multiple Choice
Two objects are observed under a light microscope. If object a is 245-nm away from object b, would you have a good resolution? Condition: light wave used has a wavelength of 500 nm.
YES
NO
28
Poll
Two objects are observed under a light microscope. If object a is 355-nm away from object b, and you had a good resolution, then what was the light wave's wavelength used?
710 nm
700 nm
650 nm
29
Multiple Choice
Which of the following colors of light provides the BEST RESOLUTION that can be obtained using a light microscope?
green
red
blue
violet
30
31
Figures a and b are the same specimen. Which one has better image?
Choose your answer.
32
Multiple Choice
Figures a and b are the same specimen. Which one has better image?
a
b
33
Transparent Specimen
Which of the two would show you a clear image of the cell's structures?
34
Poll
CHOOSE ONE.
Right image
Left image
35
Biologists' Dilemma
Electron Microscopy
2nd of September 2020
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