A brief description of how Phone-line Networking works. This site is part of Marshall Brain's HowStuffWorks.com. Considers advantages of different networking solutions, including using existing phone lines and wireless networks. Some knowledge of installi
In order to explain the frequency distribution of radiation from a hot cavity (blackbody radiation) Planck proposed the ad hoc assumption that the radiant energy could exist only in discrete quanta which were proportional to the frequency.
When two sound waves of different frequency approach your ear, the alternating constructive and destructive interference causes the sound to be alternatively soft and loud - a phenomenon which is called "beating" or producing beats.
A list of various instruments (violin, viola, cello, double bass, acoustic guitar and electric guitar) with information on how they work and the physics involved.
A text book on the screen which explains the medical uses of ultrasound. No animations or graphics but there are links back to a medical techniques home page.
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