LADP-12 Apparatus of Millikan’s Experiment – Basic Model

Specifications

Average relative error          ≤3%

⒈ 　Separation distance between electrode plates     （5.00 ± 0.01）mm

⒉ 　CCD observing microscope

Magnification            ×50             focal length      66 mm

Linear field of view       4.5 mm

⒊ 　Working voltage and stop watch

Voltage value            0～500V         voltage error         ±1V

Timing limit             99.9S            timing error          ±0.1S

⒋ 　CCD electronic display system

Linear field of view      4.5 mm           pixel     537（H）×597（V）

Sensitivity              0.05LUX         resolution       410TVL

Monitor screen          10″              monitor’s central resolution    800TVL

Scale mark equivalent   （2.00 ± 0.01）mm（calibrated by a standard 2.000±0.004 mm Scaled block）

⒌ 　Continuous tracking time for a certain oil drop         >2h.

Notes

1.Install a graphic card and soft ware (purchase separately) to model LADP-12 oil drop apparatus and the real-time sample data collection experiment may start immediately (see “Brief Introduction to the Operation of Model LADP-13  Millikan Oil Drop Apparatus”).

2. Because of the defective quality of toggle switches this experiment has replaced such switches with programmable electronic switches.

3. Since the tendency of physics experiments’ teaching reform is to construct digital physics labs, this experiment has left rooms for such tendency. It can be improved very easily to suit for the digitalization tendency.