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Electron Microscopy

Electron Microscopy

Assessment

Presentation

•

Science

•

11th Grade

•

Practice Problem

•

Medium

Created by

John Galera

Used 3+ times

FREE Resource

21 Slides • 14 Questions

1

Electron Microscopy

2nd of September 2020

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2

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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

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What makes Larcopyle butschlii under SEM clearer than the other?

5

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Radiolarian

6

Multiple Choice

Which of the following phrases describes "Resolution"?

1

ability to distinguish between 2 different points

2

the number of times greater that an image is than the actual object

3

the number of pixels the screen has

7

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8

"The maximum resolution of a light microscope is 20 nm."

What does this mean?

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9

Which specimen image is resolved?

Choose carefully!

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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?

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12

How is resolution linked with the nature of light?

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13

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14

Multiple Choice

Which of the following wavelengths of light waves is best in viewing the specimen under a light microscope?

1

400 nm

2

700 nm

3

450 nm

15

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16

Let's try check your knowledge on the visible light spectrum!

Ready?

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17

Multiple Choice

All wavelengths of visible light spectrum are moving at the same speed but different frequency.

1

TRUE

2

FALSE

18

Multiple Choice

The human eye can distinguish between the different wavelengths of visible light spectrum.

1

TRUE

2

FALSE

19

Look at Figure 1.12 on page 11, CB. 

How does the wavelength of light affect resolution?

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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.

1

TRUE

2

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

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25

Study the next figure. 

26

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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.

1

YES

2

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?

1

green

2

red

3

blue

4

violet

30

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31

Figures a and b are the same specimen. Which one has better image?

Choose your answer.

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32

Multiple Choice

Figures a and b are the same specimen. Which one has better image?

1

a

2

b

33

Transparent Specimen

Which of the two would show you a clear image of the cell's structures?

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34

Poll

CHOOSE ONE.

Right image

Left image

35

Biologists' Dilemma

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pattern-tertiary

Electron Microscopy

2nd of September 2020

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