How do electromagnetic waves differ from sound waves? And name purposes for X-rays.?
Electromagnetic waves are transverse waves, which are waves that travel perpendicular to the movement of the particles that they encounter. They also move at the velocity of 3 x 10^8 m/s in a vacuum (they move slower in matter) and are created when you have an electric field perpendicular to a magnetic field. Sound waves are longitudinal waves, which are waves in which the particles move about in the same plane as the wave. Sound waves are created by the movement of matter particles amongst each other (“vibrations”), and since they rely on matter to exist, unlike EM waves, sound waves cannot pass through a vacuum and travel faster in matter. X-rays are used to identify flaws and inflammations that afflict solid structures in the bodies of humans or animals, such as bones and organs, in order to treat them. X-rays are also used to scan luggage in airports to identify objects in the luggage to determine if passengers are carrying something dangerous or illegal.
