Microscopes Flashcards

1
Q

When was the first microscope developed?

A

final years of 16th century

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2
Q

Where was the first microscope developed?

A

England

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3
Q

How was the first microscope discovered?

A

by accidentally inverting a telescope

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4
Q

Who discovered that a combination of two lenses (ocular and objective) enlarges an object that could be seen?

A

Zaccharias Jansen and his son Han

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5
Q

When was the compound microscope modified and by who?

A

17th century; Robert Hooke

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6
Q

Who realized that lenses with very short focal lengths were the key to more magnification?

A

Robert Hooke and Anthony van Leeuwenhoek

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7
Q

Who discovered animalcules, or bacteria?

A

van Leeuwenhoek

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8
Q

What do you use when making a microscopic drawing?

A

pencil

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9
Q

Where do you label in a drawing?

A

Outside the FOV

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10
Q

How do you determine the total magnification?

A

multiply the power of the objective times ten

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11
Q

total magnification on low power

A

40x

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12
Q

total magnification on medium power

A

100x

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13
Q

total magnification on high power

A

430x

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14
Q

Largest field of view

A

low power

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15
Q

Smallest field of view

A

high power

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16
Q

When looking at something through a microscope, it will appear upside down.

A

True

17
Q

When looking at something through a microscope, it will appear reversed.

A

True

18
Q

Why does something appear upside down and backwards?

A

because of two sets of mirrors in the microscope

19
Q

When moving something under the microscope to the right, it will appear to move to the . . .

A

left

20
Q

What is magnification?

A

Magnification is the image getting bigger.

21
Q

What is resolution?

A

Resolution is how clear the image is.

22
Q

What is a simple microscope?

A

microscope with one lens

23
Q

What is a compound microscope?

A

microscope with two sets of lenses

24
Q

What is an example of a compound microscope?

A

our microscopes

25
Q

What is an example of a simple microscope?

A

magnifying glass

26
Q

If the lens is dirty, how do you clean it?

A

lens paper

27
Q

How do you properly put away a microscope?

A

Turn the objective lens to low, turn the light off, wrap the cord around the arm, and put cover on

28
Q

I should use the coarse adjustment on high power.

A

false

29
Q

Name the steps for making a wet mount.

A
  1. Place the specimen on the glass slide.
  2. Pour 2-3 drops of water on the specimen.
  3. Place a cover slide over the water, holding it perpendicular to the slide, then gently dropping it.
30
Q

What four colors are used in printers?

A

cyan, magenta, yellow, black

31
Q

What is a concave lens?

A

lens that curves inward

32
Q

What is a convex lens?

A

lens that curves outward