|Project Title||Electric Honeycomb|
|Students||Muhammad Shaheer Niazi, O-Level student, LCAS, Lahore|
Shaheer Niazi was asked to set a vertically oriented steel needle over a horizontal metallic plate into which oil was placed. If you apply constant high voltage between the needle and the plate, a cell structure appears on the surface of the liquid. The system is in a point-plane configuration and the needle is placed at a height allowing partial discharge via corona and ion winds. The ion winds bombard the surface of the dielectric with charged ions, which charge the surface. The interaction between the outer charges, and the charges of the plate cause an instability to occur. This is called the rose window instability. Magnificent patterns emerge on the surface of the oil. Shaheer is investigating the underlying mechanisms.
|Project Title||Ultrahydrophobic water|
|Students||Khadija Niazi, O-Level student, LCAS, Lahore|
Khadija Niazi was asked to set a dish filled with soapy water onto a loudspeaker or other vibrator. When it oscillates, it is possible to hold small droplets on its surface for a long time. She had to describe this behavior and came to the conclusion that various properties help keep these droplets afloat out of which the most important factor is the creation and refreshing of an air cushion between the droplet and water bath. In addition, surface tension differences and hydrophobic parts of the soap help keep the droplet from coalescing. The droplets also exhibit behavior that can be mapped to the behavior of particles at the quantum scale.
|Project Title||Catching the decay of muons|
A computer science major, Hassaan Mubasher, has been busy this semester detecting muons. These muons traverse a trio of scintillators and decay, producing characteristic flashes that are detected by photomultiplier tubes. The signals are then routed into timing, logic, coincidence units and multi channel analyzers. The experimental data is processed and analyzed, looking for signature muon events. Outcome: Experiment for the advanced physics lab. Outcome: Write-up is in progress.
|Project Title||Reproducing Roemer’s determination of the speed of light|
Mustafa Afzal Saeed spent this June all about appreciating the simplest of techniques to provide the answer to the toughest of conundrums. He worked on reconstructing Ole Roemer’s technique to calculate the speed of light. The technique comprised of measuring the variations in the apparent periods of Io (one of Jupiter’s moons), calculating the distance between Earth and Jupiter at those respective measurements, and calculating the speed of light by dividing the extra distance the Earth moves between successive observations of Io, by the additional time Io took to complete one period. The subsequent Matlab Program that was created churned up a value of ‘c’ which was 85% of its actual value. This project, however, will be refined and polished in the months to come. Outcome: Work continues.
|Project Title||Reproducing results from Freshmen experiments|
Muhammad Faraz’s primary task was to reproduce the results of the recently developed Freshmen Lab experiments. These experiments include the testing of Hall effect experiment, b) Testing of Franck-Hertz’s experiment, (c) The magic eye experiment. As a secondary assignment he had to automate the latent heat of vaporization of liquid nitrogen experiment latent heat of liquid nitrogen experiment. For that a computer interfaced electronic balance was used along with the Labview software. The results matched with the published value of latent heat of LN2. Outcome: testing of newly built experiments.
|Project Title||Ellipsometry of magnetic field assisted electro-deposited films|
Hamza Qureshi, a physics major, worked on electro-depositing nickel films in the presence of magnetic fields. The goal was to control and understand the size and thickness dependent orientation of the magnetization of these films. The grown films were observed under optical microscopes and their thickness were determined using ellipsometry, Finally, MOKE signals were acquired using the homemade assemblies, under different configurations of the ambient magnetic field. Also see the Hunerkada presentation: Ellipsometry of electro-deposited magnetic thin films. Outcome: Ongoing research.