T๐ก๐ ๐๐ง๐๐ฅ๐ฒ๐ฌ๐ข๐ฌ ๐จ๐ ๐ญ๐ก๐ ๐ข๐ง๐ญ๐๐ซ๐๐๐ญ๐ข๐จ๐ง ๐๐๐ญ๐ฐ๐๐๐ง ๐ฆ๐๐ญ๐ญ๐๐ซ ๐๐ง๐ ๐๐ง๐ฒ ๐ฉ๐จ๐ซ๐ญ๐ข๐จ๐ง ๐จ๐ ๐ญ๐ก๐ ๐๐ฅ๐๐๐ญ๐ซ๐จ๐ฆ๐๐ ๐ง๐๐ญ๐ข๐ ๐ฌ๐ฉ๐๐๐ญ๐ซ๐ฎ๐ฆ. ๐๐ซ๐๐๐ข๐ญ๐ข๐จ๐ง๐๐ฅ๐ฅ๐ฒ, ๐ฌ๐ฉ๐๐๐ญ๐ซ๐จ๐ฌ๐๐จ๐ฉ๐ฒ ๐ข๐ง๐ฏ๐จ๐ฅ๐ฏ๐๐ ๐ญ๐ก๐ ๐ฏ๐ข๐ฌ๐ข๐๐ฅ๐ ๐ฌ๐ฉ๐๐๐ญ๐ซ๐ฎ๐ฆ ๐จ๐ ๐ฅ๐ข๐ ๐ก๐ญ, ๐๐ฎ๐ญ ๐ฑ-๐ซ๐๐ฒ, ๐ ๐๐ฆ๐ฆ๐, ๐๐ง๐ ๐๐ ๐ฌ๐ฉ๐๐๐ญ๐ซ๐จ๐ฌ๐๐จ๐ฉ๐ฒ ๐๐ฅ๐ฌ๐จ ๐๐ซ๐ ๐ฏ๐๐ฅ๐ฎ๐๐๐ฅ๐ ๐๐ง๐๐ฅ๐ฒ๐ญ๐ข๐๐๐ฅ ๐ญ๐๐๐ก๐ง๐ข๐ช๐ฎ๐๐ฌ. ๐๐ฉ๐๐๐ญ๐ซ๐จ๐ฌ๐๐จ๐ฉ๐ฒ ๐ฆ๐๐ฒ ๐ข๐ง๐ฏ๐จ๐ฅ๐ฏ๐ ๐๐ง๐ฒ ๐ข๐ง๐ญ๐๐ซ๐๐๐ญ๐ข๐จ๐ง ๐๐๐ญ๐ฐ๐๐๐ง ๐ฅ๐ข๐ ๐ก๐ญ ๐๐ง๐ ๐ฆ๐๐ญ๐ญ๐๐ซ, ๐ข๐ง๐๐ฅ๐ฎ๐๐ข๐ง๐ ๐๐๐ฌ๐จ๐ซ๐ฉ๐ญ๐ข๐จ๐ง, ๐๐ฆ๐ข๐ฌ๐ฌ๐ข๐จ๐ง, ๐ฌ๐๐๐ญ๐ญ๐๐ซ๐ข๐ง๐ .
๐๐๐๐๐ ๐๐ ๐๐๐๐๐๐๐๐๐๐๐๐..
- Absorption
- Emisson
- Scattering or Diffraction and reflecton
- Resonance or Coherance
- Impedance
- Inelastic scattering..
Absorption- This
is the most common type of spectroscopy. Absorption occurs when the incident
electromagnetic radiation is completely absorbed by the matter with which it
interacts. Different electromagnetic radiation gets absorbed by different
matter species such as atoms and molecules. Absorption is generally measured by
monitoring the amount of radiation that is transmitted through the material.
Common types of spectroscopy involving absorption are ultraviolet-visible
spectroscopy (UV-Vis spectroscopy) or infrared spectroscopy (IR spectroscopy).
Emission: Emission is the phenomenon when
matter itself radiates electromagnetic radiation. The phenomenon of emission
may be triggered by an external source of energy such as flames (in case of
flame photometry), or even electromagnetic radiation of higher energy (in case
of fluorescence). Commonly emission is observed in fluorescence spectroscopy.
Scattering or Diffraction and Reflection- This
type of spectroscopy depends upon how the incident electromagnetic radiation is
scattered, diffracted or reflected. An example of scattering or diffraction is
X-ray crystallography which employs high energy radiations of x-rays in order
to examine the arrangement of atoms in crystals of proteins and molecules.
Resonance or Coherance- - This spectroscopy employs
electromagnetic radiation to couple to quantum states of matter in a coherant
interaction. An example of this type of spectroscopy is Nuclear Magnetic
Resonance spectroscopy (NMR spectroscopy).
Impedance-It
involves the slowing or impeding of the electromagnetic radiation for example,
refraction of light.
Inelastic Scattering- This phenomenon is observed when
the wavelength of the incident radiation shifts after it interacts with matter.
An example of inelastic scattering is observed in Raman spectroscopy.
VARIOUS SPECTROSCOPIC TECHNIQUES
Ultraviolet-Visible Spectroscopy
(UV-Vis Spectroscopy)
Type of Electromagnetic Radiation-Ultraviolet and Visible spectrum
Type of Matter Observed; Electrons
and electronic excitations.
⃣ Nuclear Magnetic Resonance Spectroscopy; (NMR
Spectroscopy)
Type of Electromagnetic Radiation ; Radiowaves
Type of Matter Observed; Nucleus
Type of Interaction ; Resonance or Coherance
⃣ Infrared Spectroscopy (IR Spectroscopy)
Type of Electromagnetic Radiation-Infrared spectrum
Type of Matter Observed-Molecular rotations, molecular
vibrations, bonds between atoms
Type of Interaction - Absorbance
(or transmittance)
⃣ Fluorescence Spectroscopy
Type
of Electromagnetic Radiation-Ultraviolet and Visible spectrum
Type of Matter Observed-Electrons and electronic excitations
Type of Interaction - Emission
5⃣ Flame emission spectroscopy (Flame photometry)
Type of Electromagnetic Radiation-Ultraviolet and Visible spectrum
Type of Matter Observed- Atoms
Type of Interaction - Emission
6⃣ X-Ray Diffraction Crystallography
Type of Electromagnetic Radiation-X-rays
Type of Matter Observed- Electron
denisities
Type of Interaction - Diffraction
or Scattering
7⃣ Atomic Absorption and Emission Spectroscopy
Type of Electromagnetic Radiation-Ultraviolet and Visible spectrum
Type of Matter Observed- Atoms
Type of Interaction -
Absorption or Emission







