Millikan Oil Drop Apparatus
Supertek’s Millikan Oil Drop Apparatus is a contemporary version of the classic design which allows the students to observe the velocity of an oil drop rising and falling in an electric filed. The apparatus is equipped with camera which allows the user to connect it with the computer screen for an easy viewing of the droplets. It permits the calculation of the force acting on the charge carried by the oil drop.
What’s Included
1x Millikan Oil Drop Apparatus
1x Non-Volatile Oil
1x Multimeter
1x Stopwatch
Experiments
To determine the charge of an electron by Millikan’s Oil Drop Method
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Related Products
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Experiment
Size of Particle Experiment
OBJECTIVES
- To measure the width/thickness of the given samples by analyzing the diffraction pattern.
PRINCIPLE
The characteristics of light such as interference and diffraction can be understood when light is studied as a wave phenomenon. Interaction of waves with matter results in either transmission, reflection, absorption, or diffraction of the wave. When the size of the matter is comparable to the wavelength of the wave that it interacts with, a phenomenon called diffraction occurs. Diffraction of light due to particles is a function of the size of the particle and the wavelength of the light incident. It is possible to measure the size of a particle by studying the diffraction patterns created by it.SOP1-C -
Experiment
Quinck’s Tube Experiment
Objectives
To measure the magnetic susceptibility of a given paramagnetic sample (FeCl3).
Principle
The Quinck’s method is used to determine magnetic susceptibility of diamagnetic or paramagnetic substances in the form of a liquid or an aqueous solution. When an object is placed in a magnetic field, a magnetic moment is induced in it. Magnetic susceptibility x is the ratio of the magnetization I (magnetic moment per unit volume) to the applied magnetizing field intensity H. The magnetic moment can be measured either by force methods, which involve the measurement of the force exerted on the sample by an inhomogeneous magnetic field or induction
methods where the voltage induced in an electrical circuit is measured by varying magnetic moment.Key Features
- Compact Setup – The apparatus design is compact and yet effective to perform the experiments with ease. The simple connections and stand to hold the teslameter probe, makes it easy to handle.
- Custom Quinck’s Tube – Specially designed quinck’s tube can be attached seamlessly on the setup and dimensions are controlled such that it fits perfectly between the pole pieces.
Equipments Needed for the Experiment
- PH94012 Electromagnet for Quinck’s Tube 1
- AC030 Quinck’s Tube 1
- PH61035D/7 Power Supply for Electromagnet 1
- PH93225G Teslameter, Digital 1
- PH30780 Vernier Microscope 1
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Experiment
Brewster Angle Experiment
OBJECTIVES
- Measurement of Brewster’s angle for a given dielectric dispersive medium.
PRINCIPLE
When un-polarized light is incident on the surface of a dielectric (such as a glass), at a certain angle of incidence the reflected light is completely plane-polarized. This phenomenon was discovered by Sir David Brewster and, thus, the specific angle is called Brewster’s angle or polarization angle. Also, from the experiment, it can be confirmed that the reflected ray and the refracted ray are 90° apart when the incident angle is set at Brewster’s angle.BAE1-C -
Experiment
Interferometer Experiment
Objectives
- To produce and observe the interference pattern.
- To measure the wavelength of laser source using the interferometer.
Principle
Phenomena of interference can be explained by the principle of superposition. Consider two E.M waves simultaneously propagating through the same region of space. The resultant electric field at any point in that region of space is the vector sum of the electric field of each wave. Depending on the strength of the resulting electric field at a point in space where the two waves superpose, we observe dark and bright regions in the interference pattern.
Key Features
- Easy to Setup – The apparatus is built on a sturdy and portable platform. The legs are height adjustable to aid leveling of the platform & precise optical alignment of the laser beam. All this reduces the time taken for setup and aids the ease of measurements.
- High quality beam splitter and reflective mirrors – The setup comes with 40 x 40 x 40mm beam splitter cube and 40 x 40mm (98% highly reflective) mirrors for clear fringe pattern.
- 1 micron step movement – The complex double lever mechanism enables a least count of 1 micron in movement of the fixed mirror. Measurement error is less than 5% in wavelength measurement.
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Experiment
Atomic Spectra Experiment
OBJECTIVES
- To understand the concept of diffraction of light.
- To measure and analyze the emission spectral lines of different elements.
PRINCIPLE
The source of electromagnetic radiation is atoms. When the atoms of an element are in an excited state, they return to a lower energy state by emitting electromagnetic (EM) radiation. The transition of the electrons in the atom from a higher energy level to lower unique energy levels for the occupation of electrons, due to this the EM spectrum emitted is a unique signature of an element or a substance. The study of the characteristics of EM radiation emitted by atoms is called Atomic Emission Spectroscopy.
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