21 results found for waves

The association of DNA with water is known since the deciphering of its double helical structure by X-Ray diffraction in 1953 (Watson, Crick, Wilkins and Franklin). However the power of DNA for organizing water seems to go far beyond the direct fill....

Standing spinwaves and surface waves in layered magnetic structures can be used for the detection and quantitative evaluation of interlayer exchange coupling (IEC). Using this method antiferromagnetic IEC has been found in Fe/Cr/Fe layered structure....

The image of light waves as oscillating electromagnetic fields explains virtually all the phenomena of traditional optics.  An awareness that these waves are somehow subdivided into quanta has however been with us since the early 20th century.  The....

The UK coast is constantly being bombarded by sea waves.  There is a massive amount of power available from these waves.  Jonathan describes three different ways of generating electrical power from water waves.

Jonathan shows us with a cheap and simple homemade demonstration how your mobile telephone generates radio waves in order for you to use it to communicate.  As you will see you can use this method to explore many aspects of your mobile phone!

Basic research in science has greatly increased our understanding of nature, expanded frontiers of inquiry, shown us how little we know, triggered creative waves of invention and innovation, and prompted technological breakthroughs that were inconcei....

White light comprises colours in the visible spectrum. The electromagnetic spectrum. Speed of light. Young's experiment and waves. Quanta and photons.

Sound is produced in the larynx; filtering it in the vocal tract produces formants and phonemes. The acoustics, mechanics and some neurobiology of hearing. Pitch perception.

Reflecting waves gives standing waves, which can be resonances. Standing waves on strings and in pipes and plates.

Superposing waves with different frequencies gives beats and Tartini tones. Removing beats gives consonance. Tuning consonances gives temperament.

Frequency, amplitude, envelope and spectrum affect pitch, loudness and timbre. All are discussed and quantified here.

Moving either source or receiver produces a frequency shift called the Doppler effect, which we measure and analyse.