Objective: Carry out Millikan’s experiment to onfirm the value of the elementary charge with the help of charged oil drops
Between the years 1910 and 1913, Robert Andrews Millikan managed to measure the elementary electric charge to an unprecedented accuracy and thereby confirmed the quantum nature of charge. The experiment which now bears his name is based on measuring the quantity of charge carried by charged drops of oil, which are able to rise through the air under the influence of an electric field from a plate capacitor and descend when the field is absent. The Millikan apparatus used for this version of the experiment utilises a compact piece of equipment which is based on Millikan’s design and which does not require any radioactive source.
![Experiment: Millikan’s Experiment (230 V, 50/60 Hz), 8000774 [UE5010400-230], Fundamentals of Atomic Physics](/imagelibrary/UE5010400-230/UE5010400-230_01_Experiment-Millikan-s-Experiment-230-V-5060-Hz.jpg)
![Experiment: Millikan’s Experiment (230 V, 50/60 Hz), 8000774 [UE5010400-230], Fundamentals of Atomic Physics](/thumblibrary/UE5010400-230/UE5010400-230_01_1200_1200_Experiment-Millikan-s-Experiment-230-V-5060-Hz.jpg)
![Millikan’s Apparatus (230 V, 50/60 Hz), 1018884 [U207001-230], Millikan’s Experiment](/thumblibrary/U207001-230/U207001-230_01_140_140_Millikan-s-Apparatus-230-V-5060-Hz.jpg)
![Set of 15 Experiment Leads, 75 cm 1 mm², 1002840 [U13800], Circuits](/thumblibrary/U13800/U13800_01_140_140_Set-of-15-Experiment-Leads-75-cm-1-mm.jpg)
![Convex Lens on Stem f =+100 mm, 1003023 [U17102], Optical Components on Stem](/thumblibrary/U17102/U17102_01_140_140_Convex-Lens-on-Stem-f-100-mm.jpg)
![Optical Precision Bench D, 1000 mm, 1002628 [U10300], Optics with an Optical Bench](/thumblibrary/U10300/U10300_01_140_140_Optical-Precision-Bench-D-1000-mm.jpg)
![Helium-Neon Laser, 1003165 [U21840], Optical Lamps on Stem](/thumblibrary/U21840/U21840_01_140_140_Helium-Neon-Laser.jpg)
![Support for Optical Bench D, Set, 1012399 [U103041], Optics with an Optical Bench](/thumblibrary/U103041/U103041_01_140_140_Support-for-Optical-Bench-D-Set.jpg)
![Optical Base D, 1009733 [U10319], Optics with an Optical Bench](/thumblibrary/U10319/U10319_01_140_140_Optical-Base-D.jpg)
![Supplement: Interferometer, 1002652 [U10351], Interferometer](/thumblibrary/U10351/U10351_01_140_140_Supplement-Interferometer.jpg)
![DC Power Supply, 32 V, 20 A (230 V, 50/60 Hz), 1012857 [U11827-230], Power Supplies](/thumblibrary/U11827-230/U11827-230_01_140_140_DC-Power-Supply-32-V-20-A-230-V-5060-Hz.jpg)
![Barrel Foot, 1 kg, 1002834 [U13265], Bases](/thumblibrary/U13265/U13265_01_140_140_Barrel-Foot-1-kg.jpg)
![High-Quality Vacuum Hand Pump, 1012856 [U205001], Vacuum Pumps](/thumblibrary/U205001/U205001_01_140_140_High-Quality-Vacuum-Hand-Pump.jpg)
![Quarter-Wavelength Filter on Stem, 1021353 [U22023], Optical Components on Stem](/thumblibrary/U22023/U22023_01_140_140_Quarter-Wavelength-Filter-on-Stem.jpg)
![AC/DC Power Supply 0 − 12 V, 3 A (230 V, 50/60 Hz), 1021091 [U22500-230], Power Supplies](/thumblibrary/U22500-230/U22500-230_01_140_140_ACDC-Power-Supply-0-12-V-3-A-230-V-5060-Hz.jpg)
![Coil D, 900 Turns, 1012859 [U8497390], Demountable Transformer D](/thumblibrary/U8497390/U8497390_01_140_140_Coil-D-900-Turns.jpg)
![Analogue Multimeter ESCOLA 30, 1013526 [U8557330], Hand-held Analog Measuring Instruments](/thumblibrary/U8557330/U8557330_01_140_140_Analogue-Multimeter-ESCOLA-30.jpg)
![Measurement Amplifier U (230 V, 50/60 Hz), 1020742 [U8557560-230], Measuring Amplifier](/thumblibrary/U8557560-230/U8557560-230_01_140_140_Measurement-Amplifier-U-230-V-5060-Hz.jpg)
![Polarising Attachment, 1021364 [U8557760], Polarisation](/thumblibrary/U8557760/U8557760_01_140_140_Polarising-Attachment.jpg)
![Electromagnet Accessory for Zeeman Effect, 1021365 [U8557770], Fundamentals of Atomic Physics](/thumblibrary/U8557770/U8557770_01_140_140_Electromagnet-Accessory-for-Zeeman-Effect.jpg)
![Cadmium Lamp with Accessories (230V, 50/60 Hz), 1021366 [U8557780-230], Fundamentals of Atomic Physics](/thumblibrary/U8557780-230/U8557780-230_01_140_140_Cadmium-Lamp-with-Accessories-230V-5060-Hz.jpg)
![Experiment: Michelson-Interferometer, 8000684 [UE4030410], Wave optics](/thumblibrary/UE4030410/UE4030410_01_140_140_Experiment-Michelson-Interferometer.jpg)