1. Feb 25, 2007 #1

   shehri

   

   1. The problem statement, all variables and given/known data
   
   
   
   2. Relevant equations
   
   My book mentions a telescope in order to measure velocities of electron.But does not explain why to use it?Plz. tell me why to use a Telescope?Thanks.
   
   3. The attempt at a solution

    

   shehri, Feb 25, 2007
2. 
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3. Feb 26, 2007 #2

   berkeman

   

   Staff: Mentor

   Could they mean microscope? AFAIK, Milikan's oil drop experiment was conducted in a small container, and small motions of the oil drops were being observed....
   
   The drawing at the wikipedia.org entry for this experiment definitely calls it a "microscope":
   
   http://en.wikipedia.org/wiki/Oil-drop_experiment

    

   berkeman, Feb 26, 2007

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