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Vollmer, Michael; Mustard, Alexander – Physics Education, 2019
Water can exhibit many different colors due to a variety of physical properties. Here, we focus on some observable colors within very pure freshwater. We only treat the absorption of light due to electronic and ro-vibrational excitations and scattering due to refractive index fluctuations of the water and the respective consequences for the…
Descriptors: Science Instruction, Color, Light, Scientific Concepts
Vollmer, Michael; Möllmann, Klaus-Peter – Physics Education, 2018
Recently, infrared cameras have become available as smartphone accessories. Being less expensive than regular infrared cameras they are readily affordable for schools and many teachers may even privately own one due to their potential to visualize all kinds of thermal phenomena in physics teaching. Any science teacher who wants to use such a…
Descriptors: Physics, Teaching Methods, Science Instruction, Telecommunications
Vollmer, Michael; Möllmann, Klaus-Peter – Physics Education, 2018
There are many physics experiments with long time scales such that they are usually neither shown in the physics class room nor in student labs. However, they can be easily recorded with time-lapse cameras and the respective time-lapse videos allow qualitative and/or quantitative analysis of the underlying physics. Here, we present some examples…
Descriptors: Physics, Science Instruction, Video Technology, Scientific Principles
Vollmer, Michael; Möllmann, Klaus-Peter – Physics Education, 2018
Video analysis with a 30 Hz frame rate is the standard tool in physics education. The development of affordable high-speed-cameras has extended the capabilities of the tool for much smaller time scales to the 1 ms range, using frame rates of typically up to 1000 frames s[superscript -1], allowing us to study transient physics phenomena happening…
Descriptors: Physics, Science Education, Motion, Time
Vollmer, Michael; Mollmann, Klaus-Peter – Physics Education, 2015
A very old and well-known magical trick is the so-called tablecloth pull. A table is covered with a tablecloth, on top of which are certain objects. The task is to remove the tablecloth while the objects--which must not be touched--stay on top of the table. This article describes the physics behind the experiment, and presents examples recorded…
Descriptors: Science Instruction, Physics, Motion, Scientific Principles
Vollmer, Michael; Shaw, Joseph A – Physics Education, 2013
Surprisingly colourful views are possible from sparkling white snow. It is well known that similarly colourful features can exist in the sky whenever appropriate ice crystals are around. However, the transition of light reflection and refraction from ice crystals in the air to reflection and refraction from those in snow on the ground is not…
Descriptors: Color, Science Instruction, Physics, Light
Vollmer, Michael; Mollmann, Klaus-Peter – Physics Education, 2012
The recent introduction of inexpensive high-speed cameras offers a new experimental approach to many simple but fast-occurring events in physics. In this paper, the authors present two simple demonstration experiments recorded with high-speed cameras in the fields of gas dynamics and thermal physics. The experiments feature vapour pressure effects…
Descriptors: Heat, Thermodynamics, Science Instruction, Scientific Principles
Vollmer, Michael; Mollmann, Klaus-Peter – Physics Education, 2011
The enormous progress in the fields of microsystem technology, microelectronics and computer science has led to the development of powerful high speed cameras. Recently a number of such cameras became available as low cost consumer products which can also be used for the teaching of physics. The technology of high speed cameras is discussed,…
Descriptors: Physics, Photography, Visual Aids, Science Instruction
Vollmer, Michael; Mollmann, Klaus-Peter – Physics Teacher, 2011
Magic tricks are very popular, and they can and should be used in teaching when the underlying principle is easily explained by physics. Such tricks often fall in the realm of hands-on experiments, which are considered to be potentially very effective in raising interest and motivating students. Unfortunately, many hands-on experiments are easy to…
Descriptors: Physics, Photography, Films, Science Activities
Vollmer, Michael; Mollmann, Klaus-Peter – Physics Education, 2012
We present fascinating simple demonstration experiments recorded with high-speed cameras in the field of fluid dynamics. Examples include oscillations of falling droplets, effects happening upon impact of a liquid droplet into a liquid, the disintegration of extremely large droplets in free fall and the consequences of incompressibility. (Contains…
Descriptors: Mechanics (Physics), Science Experiments, Photography, Science Instruction
Vollmer, Michael; Mollmann, Klaus-Peter – European Journal of Physics, 2012
The introduction of modern high-speed cameras in physics teaching provides a tool not only for easy visualization, but also for quantitative analysis of many simple though fast occurring phenomena. As an example, we present a very well-known demonstration experiment--sometimes also discussed in the context of falling chimneys--which is commonly…
Descriptors: Physics, Science Instruction, Photography, Teaching Methods