SPECTROSCOPY?

EM Radiation?

Wave Properties? (Electric Field)

Wave Properties? (Magnetic Field)

PERIOD (p)?

FREQUENCY (f@v) ?

AMPLITUDE (A)?

WAVELENGTH( lamda)?

WAVENUMBER?

RADIANT POWER (P)?

INTENSITY (I)?

C=V(lamda)

wavelength( lamda) 8 1/frequency(v)

Particle Properties (1)

Particle Properties (2)

ABSORPTION

Quantitative absorption methods require 2 power measurements:

Transmittance
(commonly expressed in %)

Absorbance

BEER'S LAW

Limitations to The Applicability of Beer’s Law (3)

FUNDAMENTAL DEVIATION

INSTRUMENTAL DEVIATION

CHEMICAL DEVIATION

ABSORPTION

EMISSION

SCATTERING

a molecule may absorb energy in 3 ways:

Absorption spectrum

Band spectrum

Continuum spectrum