Electromagnetic Energy Flashcards
Disturbance that travels through space and time
Wave
Transfer enegy from one place to another
Wave motion
Continuing of an electric field developing magnetic field
Electromagnetic waves
Continuous group of waves
Wave train
Describes a smooth repetitive oscillation
Sine wave / sinusoid
Distance from one crest to another
Wavelength
Half the height from the peak of a crest to the lowest point of the wave
Amplitude
Product of frequency and wavelength
Velocity
Unit for velocity
Meter per second (m/s)
Miles per sec
Speed of light ( electromagnetic wave travels )
3x10^ 8 m/s
186 000 mi/s
Number of oscillationd per unit time
Frequency
Frequency is identified as
Cycles per second
Frequency is represented by
Nu (v)
Unit of measurement for frequency
Hertz
Wavelength is represented by
Lambda (A)
Unit of measurement in wavelength
Angstrom (A)
Nanometer (nm)
1 A
1x 10^-10 m
1 nm
10 A
1nm
10^-9 m
Frequency and wavelength are
Inversely proportional
Frequency and energy of photon are
Proportional
All energy is transmitted and absorbed in discrete particles called photons
Quantum theory
Energy disturbances moving through space
Photons
Interaction among energy, force or mass
Field
Energy of thephoton varies with
Frequency
Energy =
Planck’s constant (h) x frequency
Planck’s constant
- 626 x 10^-34 joules-second
4. 135 x 10^-15 electron volt-sec
1 joule
6.24 x 10^18 eV
1 ev
1.6 x 10^-19 J
1 erg
1 x10^7 J
1 erg (2)
6.24 x 10^11 eV