Basic internship
Basic internship
Practical course in the module Physics I for students of environmental sciences - basic practical course
- Please also note the general information on the homepage about the Physics internships for Environmental Sciences.
Introduction
General information on the basic practical course, on preparing and carrying out experiments, on keeping records, on using the computer, on setting up electrical circuits and on mechanical measuring tools; introduction to the MATLAB and ORIGIN programmes
Error and equalisation calculation
Random and systematic errors, histograms of measured values, density function, Gaussian curve, probabilities, mean value and standard deviation, absolute and relative errors, errors of magnitude, error propagation, accuracy data, linear regression, linearisations, correlation, errors of weighted mean values; application example thread pendulum
Oscilloscope and function generator
Block diagrams, functional principle and operating modes of electron beam and digital oscilloscopes, signal sampling, function generators, trigger types, AC/DC couplings, amplitude, frequency and phase measurements, mains voltage, measurement of light intensities, measurement of light pulses
Sensors for force, pressure, distance, angle and light intensity
Transducer, linearity, response time, measuring range, resolution, noise, bending rod, strain gauge, force sensor, piezoresistive effect, pressure sensor, pressure gauge, triangulation, laser distance sensor, Hall effect, angle sensor, semiconductor, doping, pn junction, barrier layer, photodiode, spectral sensitivity.
Viscosity and Reynolds numbers
Viscosity and kinematic viscosity, Stokes' law, falling ball method, capillary viscometer, laminar and turbulent flows, pipe flow, Reynolds numbers, continuity equation, Bernoulli's and Hagen-Poisseuille's law
Geometric optics, optical imaging and aberrations
Optical imaging, focal length determination, Bessel method, optical instruments, spherical and chromatic aberrations, apertures and pupils, depth of field, magnification of angle of view, telescope
Surface tension, minimal surfaces and coffee stains
Tear-off method, bubble pressure method, formation and shaping of minimal surfaces, capillary flows, mass transport in coffee stains, internal pressure of gas bubbles, force and pressure sensors
- Photo of the tear-off method experiment
- Film on the tear-off method (" Note)
- Photo of the bubble pressure method experiment
- Film of the bubble pressure method (" Note)
- Photo of the minimum surface area part of the experiment
- Photo of the internal pressure in gas bubbles part of the experiment
- Instruction text
Measurement of magnetic fields
Biot-Savart law, Helmholtz coils, stationary and non-stationary fields, torques in magnetic fields, induction coils
- Photo of the experimental section on the earth's magnetic field and Helmholtz coils
- Photo of the stationary magnetic field part of the experiment
- Instruction text as PDF file