--%>

What is Spectroscopy?

This is a very important aspect of Physical Chemistry in which knowledge of the size, shape, rigidity and electronic structure of molecules deduced from the experimental methods treated here goes hand in hand with the theoretical approaches of chemical reactions. Spectroscopy is the measurement and interpretation of electromagnetic radiation absorbed or emitted when the molecules, atoms, or ions of a sample move from one allowed energy to another. These allowed energies have been used throughout in our interpretation of the thermodynamic properties of materials. Grouped here and in the following are treatments of various experimental methods that give information on the geometry and electronic structures of molecules. The difficulties encountered in the applications of a completely theoretical approach to molecular bonding and structure lead one to refer frequently to experimentally determined properties in order to understand molecular phenomena. Now the origin of the values used there for the spacing of so
e of the energy levels will be seen. Our principal concern is molecular spectroscopy that stems from changes in the rotational, vibrational and the electronic energies. In addition, energies not considered in our thermodynamic studies, resulting from energy differences that arise when a sample is placed in a magnetic or electric field, are susceptible to spectroscopic studies. Nuclear-magnetic-resonance (nmr) spectroscopy and electron-spin-resonance (esr) spectroscopy illustrate such studies. 

   Related Questions in Chemistry

  • Q : Describe Transformation Matrices. Each

    Each symmetry operation can be represented by a transformation matrix.You have seen what happens when a molecule is subjected to the symmetry operation that corresponds to any of the symmetry elements of the point group to which the molecule belongs. The m

  • Q : Wavelengths which the human eye can see

    Briefly state the wavelengths which the human eye can see?

  • Q : How much phosphorus is in superphosphate

    Superphosphate has the formulate: CaH4 (PO4)2 H2O calculate the percentage of Phosphorus in this chemical. Show your calculations

  • Q : Importance of organic chemistry

    Describe the importance of organic chemistry?

  • Q : Which solution will have highest

    Which solution will have highest boiling point:(a) 1% solution of glucose in water  (b) 1% solution of sodium chloride in water  (c) 1% solution of zinc sulphate in water  (d) 1% solution of urea in waterAnswer: (b) Na

  • Q : Problem on relative humidity Relative

    Relative humidity is the ratio of the partial pressure of water in air to the partial pressure of water in air saturated with water at the same temperature, stated as a percentage: Relative  =

    Q : Chemistry brief discription of relative

    brief discription of relative lowering of vapour pressure

  • Q : What are the various types of drugs

    Drugs are broadly classified into following types depending on the purpose for which they are used. 1. Antipyretics

  • Q : Describe Point Groups. For any

    For any symmetric object there is a set of symmetry operations that, together, constitute a mathematical group, called a point group.It is clear from the examples that most molecules have several elements of symmetry. The H2O

  • Q : Mole fraction of benzene Choose the

    Choose the right answer from following. In a solution of 8.7g benzene C6H6 and 46.0 gm toluene ,(C6, H5, CH3) the mole fraction of benzene in this solution is: (a)1/6 (b)1/5 (c)1/2 (d)1/3