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The Lenses

Blogs > EsX_Raptor
Post a Reply
EsX_Raptor
Profile Blog Joined February 2008
United States2802 Posts
November 19 2009 04:33 GMT
#1
Amazing how those things led us to many new discoveries/observations in both very far away objects and really, really close ones.

Ok, tomorrow we have a quiz on how a microscope, telescope and camera (lenses and mirrors) work together to give us those images.

I already know how a reflector telescope works:

[image loading]


Sorry for the sloppy drawing, here the yellow lines represent the light coming into the telescope.

But I'm not quite sure yet how a microscope (a really simple one, probably just using two lenses) works

I'll theorycraft a bit with some drawings of lenses with their focal points and incoming light rays.



*
andiCR
Profile Blog Joined March 2008
Costa Rica2273 Posts
November 19 2009 04:59 GMT
#2
[image loading]

google is your friend http://www.google.co.cr/search?q=how microscopes work&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a
Nightmare1795 wrote: I played a guy in bronze who said he was Japanese. That was the only game I ever dropped a nuke, which was purely coincidental.
meeple
Profile Blog Joined April 2009
Canada10211 Posts
November 19 2009 05:01 GMT
#3
Thats not how a normal light microscope works... he wants a pinhole one... with the light source at the bottom...
meeple
Profile Blog Joined April 2009
Canada10211 Posts
November 19 2009 05:02 GMT
#4
Like this:

[image loading]
EsX_Raptor
Profile Blog Joined February 2008
United States2802 Posts
Last Edited: 2009-11-19 05:16:26
November 19 2009 05:12 GMT
#5
it's not about the microscope itself, but more about the lenses =)

this is what i have so far:

[image loading]


but i have some problems =(

here blue is the object and red is the image

edit: here i'm just using the fact that rays parallel with the main axis bend towards the focus point and rays passing through the focus point bend parallel to the main axis. and yes, both lenses here have one of their focus points together.
skyglow1
Profile Blog Joined April 2005
New Zealand3962 Posts
Last Edited: 2009-11-19 06:33:45
November 19 2009 06:31 GMT
#6
Rays that don't cross means you won't get a real image. Instead, you'll get a virtual image, that is at the position from which those 2 diverging rays appear to be coming from. So backtrack those 2 diverging rays, see where they cross, and that's where your magnified virtual image will be. If you're still confused:

http://physics.2lv.in/blog/sites/default/files/microscope.GIF
http://physics.bgsu.edu/~stoner/P202/device/img016.JPG
EsX_Raptor
Profile Blog Joined February 2008
United States2802 Posts
November 19 2009 06:39 GMT
#7
you fucking own skyglow

props my man!
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