Illustration of system configuration
1 wind proof, 2 insulation ring,
3 oil drop, 4 clamping spring,
5 upper polar plate, 6 illuminating lamp holder, 7 light guiding column, 8 lower polar plate
Oil drop image acquired by VGA camera
(Click photo to enlarge)
Features
Compact structure and stable performance
Easy to use
Affordable
Optional VGA video camera for accurate measurement on LCD monitor
Introduction
The LEAI-40 Millikan Oil Droplet Experiment Apparatus is designed to verify the quantum nature of electrical charges and measure the elementary charge of an electron using Millikan's oil drop method. This apparatus also enables the observation of Brownian motion, allowing students to explore the random motion of particles suspended in a fluid.
Millikan's oil drop experiment is a classic experiment in modern physics, which was used to determine the charge of the electron. By observing the behavior of oil droplets between two electrodes in a known electric field, Millikan was able to calculate the elementary charge of an electron. This experiment is a cornerstone of atomic physics and demonstrates the discrete nature of electrical charge.
The LEAI-40 apparatus provides a hands-on and intuitive way for students to replicate Millikan’s experiment with modern equipment. The inclusion of an optional VGA camera with built-in electronic grid lines allows real-time observation of the oil droplet images displayed on an LCD monitor, making it easier for students to track the movement of oil droplets and measure their velocities accurately.
The instruction manual includes experimental configurations, principles and step-by-step instructions. Please click Experiment Theory and Contents to find more information about this apparatus.
Specifications
| Description | Specifications |
| Voltage between upper & lower plates | 0 ~ 500 V |
| Distance between upper & lower plates | 5 mm ± 0.2 mm |
| Magnification of measuring microscope | 30 X |
| Linear field of vision | 3 mm |
| Total division of scale | 2 mm |
| Resolution of objective lens | 100 lines/mm |
CMOS VGA Video Camera (Optional) | Sensor size: 1/4" |
| Resolution: 1280 × 1024 | |
| Pixel size: 2.8 μm × 2.8 μm | |
| Bit: 8 | |
| Output format: VGA | |
| Length measurement on screen with cross line cursor | |
| Function setting & operation: via keypad and menu | |
| Camera to eyepiece tube adapter lens: 0.3 X | |
| Dimensions | 320 mm x 220 mm x 190 mm |
Parts List
| Description | Qty |
| Main Unit | 1 |
| Oil Sprayer | 1 |
| Clock Oil | 1 bottle, 30 mL |
| Power Cord | 1 |
| Instructional Manual | 1 |
| CMOS VGA Camera & Adapter Lens (Optional) | 1 set |
Illustration of system configuration
1 wind proof, 2 insulation ring,
3 oil drop, 4 clamping spring,
5 upper polar plate, 6 illuminating lamp holder, 7 light guiding column, 8 lower polar plate
Oil drop image acquired by VGA camera
(Click photo to enlarge)
