Electromagnetism

Hans Christian Oersted

Hans Christian Oersted

discovered that electric currents create magnetic fields

Hans Christian Oersted

Magnetic needle is deflected when a current in a nearby wire varies

Hans Christian Oersted

Electric current creates a circular magnetic field

Hans Christian Oersted

Electric telegraph

Andre Marie Ampere

Discovered Electrodynamics

Ampere

Unit for electric current

Andre Marie Ampere

performed experiments to elucidate the relationship between electric current and magnetism

Joseph Henry

Insulated wires instead of iron core

Joseph Henry

Wrapped the large number of turns of wire around the core, increasing the power of the magnet

Michael Faraday

Electro magnetic induction

Michael Faraday

Diamagnetism

Michael Faraday

Electrolysis

James Clerk Maxwell

Electromagnetic radiation/spectrum

James Clerk Maxwell

Electromagnetic wave travels in space in a form of wave as fast as the speed of light

Heinrich Hertz

Discovered the electromagnetic wave

Ampere’s Law

mathematically describes the magnetic force between 2 electric currents

speed of em waves

3 x 10^8 m/s

electromagnetism

a changing magnetic field produces an electric field (vice versa)

EM Waves

can travel in both medium and vacuum

Oscillation

back and forth movement between two positions or states of an object

mirror

smooth reflecting surface coated with metallic substance

reflection

bouncing off of light rays

incident ray

ray of light approaching the mirror represented by an arrow approaching an optical element

reflected ray

ray of light which leaves the mirror

Specular or Regular Reflection

smooth surface

Diffused or Irregular Reflection

rough surfaces

Curved Mirror

reflecting surface in which its surface is a section of sphere

Concave Mirror or Converging Mirror

reflective surface bulges away from the light source

Convex Mirror or Diverging Mirror

reflective surface bulges towards the light source

Refraction

bending of light as it passes from one transparent substance into another.

Lenses

made of transparent substance which can bend light rays