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## #1 2013-08-02 15:55:15

mathaholic
Member
From: Earth
Registered: 2012-11-29
Posts: 3,251

### Microscope

Hi;

I am confused about the history. Can you tell me more about it?

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## #2 2013-08-02 23:36:05

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,018

### Re: Microscope

Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

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## #3 2013-08-02 23:43:42

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 107,783

### Re: Microscope

Ever heard of the Dutchman Leeuwenhoek?

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #4 2013-08-03 18:22:35

mathaholic
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From: Earth
Registered: 2012-11-29
Posts: 3,251

### Re: Microscope

Yup, Anton van Leeuwenhoek.

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## #5 2013-08-03 23:42:47

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 107,783

### Re: Microscope

The guy who first invented it but Robert Hooke gets the credit for the modern form.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #6 2013-08-04 11:37:16

mathaholic
Member
From: Earth
Registered: 2012-11-29
Posts: 3,251

### Re: Microscope

So, Robert Hooke created the modernized style?

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## #7 2013-08-04 17:47:52

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 107,783

### Re: Microscope

Yes, he used two lenses rather than one.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #8 2013-08-04 19:25:16

mathaholic
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From: Earth
Registered: 2012-11-29
Posts: 3,251

### Re: Microscope

Oh. Why two?

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## #9 2013-08-04 20:42:25

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 107,783

### Re: Microscope

The two lenses are called ocular and objective. When you use one lens as Leeuwenhoek did you get more distortion.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #10 2013-08-06 18:00:03

mathaholic
Member
From: Earth
Registered: 2012-11-29
Posts: 3,251

### Re: Microscope

Why?

By the way, I know the objectives:

Scanner 4x
LPO 10x
HPO 40x
OIO 100x

Then multiply by 10x to get the total magnification.

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## #11 2013-08-06 19:20:30

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 107,783

### Re: Microscope

That is if you have a 10x ocular.

The 100x is an oil immersion and demands special techniques.

The reason you use two lenses is to cut down on distortion. Leeuwenhoek's idea was really strange and basically  uses one very big ocular.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #12 2013-08-06 20:09:32

mathaholic
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From: Earth
Registered: 2012-11-29
Posts: 3,251

### Re: Microscope

Yes.

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## #13 2013-08-06 20:14:24

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 107,783

### Re: Microscope

You rarely see oculars pf more magnification of 10x or 15x. His ocular was around 200x or 300x.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #14 2013-08-07 16:34:08

mathaholic
Member
From: Earth
Registered: 2012-11-29
Posts: 3,251

### Re: Microscope

Oh. Maybe more improvements to the microscope?

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## #15 2013-08-07 21:15:53

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 107,783

### Re: Microscope

There are limits to what can be done with light or even ultraviolet light. The next advance was the electron microscope.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #16 2013-08-09 15:52:39

mathaholic
Member
From: Earth
Registered: 2012-11-29
Posts: 3,251

### Re: Microscope

The electron? So, the compound is two lenses, right?

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## #17 2013-08-09 22:57:59

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 107,783

### Re: Microscope

Light has a certain wavelength. Things close to that wavelength or smaller can not be seen clearly by it. The best light microscopes have about 2000 X magnification or so. To get more you have to use something smaller than light. The electron is a particle we can control and it is much smaller than the wavelength of light. It requires more specimen preparation but magnifications of over 100000 are possible.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #18 2013-08-17 12:57:59

mathaholic
Member
From: Earth
Registered: 2012-11-29
Posts: 3,251

### Re: Microscope

Wow, big magnifications...

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## #19 2013-08-17 13:34:16

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 107,783

### Re: Microscope

The difference though is that in the light microscope you can see the specimens alive, in the electron microscope they can only be viewed after lots of preparation and in a vacuum. So they are dead.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #20 2013-09-20 15:44:23

mathaholic
Member
From: Earth
Registered: 2012-11-29
Posts: 3,251

### Re: Microscope

Okay.

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## #21 2013-09-20 18:11:53

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 107,783