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At GCSE, students are taught the basics of a broad range of physical concepts including energy, waves, Newtonian mechanics, electricity, thermal physics and nuclear physics among others. There is also a practical element (known as "required practicals"), which is conducted in the classroom and then assessed via questions in the final exam papers.
Some organizations responsible for holding exams have made past exam papers commercially available by either publishing the papers by themselves or licensing a publisher to do the same. For example, UPSC papers in India, SAT papers in U.S. and GCSE and A level papers in UK are being sold, as well as other exams worldwide.
The GCSE combined science A exam is made up of six papers (each one hour and ten minutes): two each for biology, chemistry and physics respectively. In combined science B, the science curriculum is delivered in four parts: biology, chemistry, physics and combined science.
The electromagnetic waves in each of these bands have different characteristics, such as how they are produced, how they interact with matter, and their practical applications. Radio waves, at the low-frequency end of the spectrum, have the lowest photon energy and the longest wavelengths—thousands of kilometers, or more.
The Atmospheric Waves Experiment (AWE) is a NASA instrument to be mounted on the exterior of the International Space Station (ISS) for the study of atmospheric gravity waves (not to be confused with astrophysical gravitational waves).
The Atacama Cosmology Telescope (ACT) was a cosmological millimeter-wave telescope located on Cerro Toco in the Atacama Desert in the north of Chile. [44] ACT made high-sensitivity, arcminute resolution, microwave - wavelength surveys of the sky in order to study the cosmic microwave background radiation (CMB), the relic radiation left by the ...
Waves of different frequencies (in light these are different colours) can interfere to form a pulse if they have a fixed relative phase-relationship (see Fourier transform). Conversely, if waves of different frequencies are not coherent, then, when combined, they create a wave that is continuous in time (e.g. white light or white noise).
Sailboats (or surfers) catching an ocean wave are sped up and slowed down to match the wave speed. It is possible to imagine Langmuir waves as waves in the sea, and the particles as surfers trying to catch the wave, all moving in the same direction. If the surfer is moving on the water surface at a velocity slightly less than the waves they ...