Electromagnetic Waves Flashcards
What are the electromagnetic waves?
Do not need matter to transfer energy
Are made by vibrating electric charges and can travel through space by transferring energy between vibrating electronic and magnetic field
How do moving charges create magnetic field?
Any moving electric charge is surrounded by an electric field and a magnetic field
What happens when electric and magnetic field change?
A changing magnetic field creates a changing electric field
Which then creates a changing electric field in another coil producing an electric current
Magnetic field
Is a field explaining the magnetic lnfluence on an object in space
Electric field
Is a field defined by the magnitude of the electric force at any given point in space
Hans Christian oersted
States that when a steady electric current passes through a wire it creates a magnetic field around it.
He noticed that when he turned on an electric current by connecting the wire to both ends of the battery, a compass needle held nearby deflected away from magnetic north.
Andre Marie Ampere
He lnvented the astatic needle a critical component of the modern astatis galvonometer.
The first to demonstrate that a magnetic field is generated when two parallel wires are charged with electricity.
Found that wires carrying current produce force on each other.
Michael faraday
He experimented by wrapping two insulted coils of wire around an iron ring.
Develop the idea of an electric field and studied the effect of currents on magnets.
James clerk maxwell
Maxwell’s equation “A dynamical theory of electromagnetic field”.
Recognize that the electromagnetism processes could be established using mathematic.
Heinrich Hertz
A brilliant German physicist and experimental is who demonstrate that the electromagnetic waves predicted by maxwell actually exist.
He proved that maxwell’s electromagnetic theory was correct and in the process, generated and detected electromagnetic waves.
