convert chemical energy into electrical energy
495 n
The vibrations of an audio speaker produce sound waves by compressions and rarefactions in air particles.
Photons
a wave with long wavelength and high frequency.
sound waves require a medium to transfer energy
FOR A+ USERS THE ANSWER IS Sound waves travel in all directions
sound waves require a medium to transfer energy
-- They are longitudinal waves and material medium is required for their propagation.
most of the EM spectrum is visible light.
No. Electromagnetic waves are produced by accelerating charges (NOT by moving charges, they have to accelerate); a neutron has no net electrical charge.