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e/m BY MILLIKAN’s OIL DROP METHOD

Experiment(s):

1. Determination of e/m of an electron by Millikan’s oil drop method



Specifications:

a) Electric field plate & microscope
Electric plate with fixed
distance and terminals for high
voltage supply
Illumination: Incandescent
focussed light beam with
position adjustment
Atomizer with oil chamber for fine mist
Microscope: 45x to 100x
magnification with focus knob
Sample: Mineral oil (provided)

b) Power supply
High voltage: For parallel plate
chamber with variable voltage
from 0 - 300 V continuously variable
Low voltage: For illumination
Rated Input: 220 V/50 Hz
or 110 V/60 Hz

c) Digi-eye camera (Optional)
Type: USB
Requires Windows 7 PC with at
least 300 MB of free memory
Resolution: 1.3 MP

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