ripples on the surface of water vibrations in a guitar string a Mexican wave in a sports stadium electromagnetic waves - eg light waves, microwaves, radio waves seismic S-waves ...

The film explores the nature of sound waves, demonstrating how sound travels as a wave through air, which acts as a medium. It illustrates sound generation using a loudspeaker, examines oscillation, ...

Transverse myelitis is a disorder of the nervous system linked to inflammation of the spinal cord. It is very rare, affecting approximately one percent of patients with lupus. It usually begins ...