INTRODUCTION TO SPECTROSCOPIC METHODS OF ANALYSIS EXAM SOLVED -18

INTRODUCTION TO SPECTROSCOPIC METHODS OF
ANALYSIS EXAM SOLVED #18
What is spectroscopy? - correct answer Optical spectroscopy, which involves energy
changes in matter (atoms, ions, and molecules) due to the
- Absorption
- Emission
- Fluorescence
- Reflection
- Scattering
- Diffraction

Of electromagnetic radiation (EMR).

What does spectroscopy study ? - correct answer Studies Electromagnetic radiation, it's
nature, production, interaction with matter, applications, detection, and the theory
developed to explain its observed behaviour and phenomena

List some examples of optical spectroscopy - correct answer gamma ray
X-ray
UV/VIS
IR
Microwave
Electron spin
NMR
And Radio Wave

What is mass spectroscopy? - correct answer Involves interaction of electrons and ions
with matter and the separation and detection of the resulting fragmentation ions and/or
molecular ions resulting in a "spectra" showing peaks for the various components.
(NOT considered an optical spectroscopic method)

What is the nature of EMR? - correct answer It is radiation of energy that is emitted by
hot (luminous) bodies, eg. Sun, electric bulb

What two property characteristics does EMR contain? - correct answer Properties of
both PARTICLES (called photons or quanta) and WAVES

What is the particulate property of EMR? - correct answer Discrete particles/bundles of
energy called quanta

What are the wave properties of EMR? - correct answer Consists of electric and
magnetic vectors at right angles to each other.

Wave property of EMR: What kind of radiation do most sources of emr produce? -
correct answer Un-polarized radiation: electric and magnetic vectors in all directions.