Was benutzt man beim Millikan-Versuch?
In das Innere des Plattenkondensators können mit einem Zerstäuber kleine Öltröpfchen gesprüht werden, die sich durch die Reibung aufladen und deren Bewegung mit Hilfe des Mikroskops beobachtet werden kann.
Was hat Millikan herausgefunden?
Mit einem völlig anderen Verfahren gelang es dem amerikanischen Physiker ROBERT ANDREWS MILLIKAN (1868-1953), in den Jahren 1909 bis 1913 erstmals die Elementarladung e relativ genau zu bestimmen. MILLIKAN erhielt für die Präzisionsmessung der Elementarladung 1923 den Nobelpreis für Physik.
How do you calculate the Millikan oil drop experiment?
Millikan Oil Drop Experiment Calculations. The experiment initially allows the oil drops to fall between the plates in the absence of the electric field. They accelerate first due to gravity, but gradually the oil droplets slow down because of air resistance. The Millikan oil drop experiment formula can be given as below. F up = Q ⋅ E F down = m
What is the importance of Millikan’s experiment?
What is the importance of Millikan’s oil drop experiment? The experiment with Millikan is important since it defined the charge on an electron. Millikan used a very basic, very simple system in which the behaviour of gravitational, electrical, and (air) drag forces were controlled.
How did Millikan figure out the charge of the drop?
So Millikan should have figured out the charge as soon as he knew the weight. Millikan allowed the drop to fall through the air to find the weight of the drop. It reaches its terminal velocity quickly. At this point, the weight is balanced by the viscous drag of the air.
Why was ordordinary oil not used in the millikens experiment?
Ordinary oil wasn’t used for the experiment as it would evaporate by the heat of the light and so could cause an error in the Millikens Oil Drop Experiment. So, the oil that is generally used in a vacuum apparatus which is of low vapour pressure was used.