33 results found for waves

An introduction to noise cancellation

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....

How we are affected by the very widespread manifesations of diffraction.

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....

Since the time of Faraday lines of force in space have been 'observed' by sprinkling iron filings around magnet. The lecturer explains how, with modern techniques we can 'see' lines of force inside a solid magnet. The studies reveal a fascinating dyn....

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....

Mark Hindmarch talks about our understanding of how we explain the immediate aftermath of the Big Bang.

Theory and evidence for gravity waves

How hot spots occur

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.

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

No 10 of ten talks examining the formation of the USA and its early development - from an English point of view. This episode shows how England and the USA have both increased their populations by waves of immigrants from many different areas.