ELECTROMAGNETIC WAVE

• Electromagnetic waves travel in a vacuum at a speed of 3x10⁸m/s and denoted as c, the speed of light
• Electromagnetic waves do not carry energy by causing matter to vibrate. It is the electric and magnetic fields that vibrate
• Electromagnetic waves carry energy from one place to another
• Both electric and magnetic fields oscillate perpendicular to each other and to the direction of the propagating wave
• Electric and magnetic fields are located at the right angles to the direction of motion of the wave, electromagnetic waves are considered as transverse waves
• An Electromagnetic wave is made up of and EF and a MF positioned at right angles to each other and to the same direction of motion of the wave
• A charged particle such as an electron moves back and forth or vibrate
• Accelerating electrons produce electromagnetic waves
• Electrons are charged particles that can produce electric and magnetic fields.
• Electromagnetic waves are produced by a charge that changes its direction or speed
• Charge particles and magnets can push or pull certain objects without even touching them
• Electromagnetic field contains both electric and magnetic field
• Magnets exert a force either repulsion or attraction
• The process by which the screws become magnets is called magnetic induction. This same process is the reason why magnets attract non - magnetized magnetic substances such as the screw. The screw becomes an induced magnet with the end nearer the magnet having an opposite polarity to that of the permagnet. Hence the attraction happens after magnetic induction occurs.