PRE QUANTUM (Petrucci) Flashcards
Define Electromagnetic radiation
is a form of energy transmission in which electric and magnetic fields are propagated as waves through empty space (a vacuum)
or through a medium, such as glass.
Define a wave
It is a disturbance that transmits energy through space or a material medium.
Define a wave crests
It is the wave’s high
points, where the wave is at its greatest height above the center line.
Define a wave’s trough
It is the wave’s low points, where the wave is at its greatest depth below the center
line.
Define amplitude
It is the maximum height of the wave above the center line or the maximum
depth below.
The product of the length of a ___(a)__ and the ___(b)__ shows how far the ____(c)____
(a) wave
(b) frequency
(c) wave front travels in a unit of time
The magnetic field component lies in a _________________ to the
electric field component.
plane perpendicular
Define what is an electric field
An electric field is the region around an electrically
charged particle.
_______________ shows the __________ of mutually _____________ electric and magnetic fields.
(a) electromagnetic waves
(b) propagation
(c) perpendicular
oscillating
Define what is a magnetic field
A magnetic field is found in the region surrounding a magnet.
According to _________ (1865), electromagnetic radiation—a propagation of _________—is produced
by an accelerating __________ (a charged particle whose
velocity changes).
(a) James Clerk Maxwell
(b) electric and magnetic field
(c) electrically charged particle
__________ are a form of electromagnetic radiation produced by causing oscillations (fluctuations) of the electric current in a specially designed electrical circuit.
Radio waves
