electromagnetic radiation in spectroscopy slideshare

Thus Spectroscopy is the science of the interaction of energy, in the form of electromagnetic radiation (EMR), acoustic waves, or particle beams, with matter. Gamma-ray spectroscopy is the quantitative study of the energy spectra of gamma-ray sources, such as in the nuclear industry, geochemical investigation, and astrophysics.. This technique employ light tends to interact with matter and exhibit some features of a sample to know much about its consistency or structure. The quantumnature of light becomes more apparent at high frequencies (or high photon energy). Production and analysis of a spectrum usually require the following: (1) a source of light (or other electromagnetic radiation), (2) a disperser to separate the light into its component wavelengths, and (3) a detector to sense the presence of light after dispersion. EMR is produced from other types of energy when created,and it is converted to other types of energy when it is destroyed. a spectrum) from which structural or compositional information can be deduced. Spectroscopy, study of the absorption and emission of light and other radiation by matter, as related to the dependence of these processes on the wavelength of the radiation. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. They all differ in frequency and wavelength. The magnetic and the electric fields come at 90° to each other and the combined waves move perpendicular to both electric and magnetic oscillating fields occurring the disturbance. = Nuclear Magnetic Resonance Basic Principles Spectroscopic technique, thus relies on the interaction between material and electromagnetic radiation The nuclei of all atoms possess a nuclear quantum number, I. In a spectroscopy experiment, electromagnetic radiation of a specified range of wavelengths is allowed to pass through a sample containing a compound of interest. Referring to Fig. The interaction between matter and electromagnetic radiation is easiest to understand if we assume that radiation consists of a beam of energetic particles called photons. • Spectroscopy is the most powerful tool available for the study of atomic & molecular structure and is used in the analysis of a wide range of samples . Electromagnetic Radiation & its effect on human, Khulna University of Engineering and Technology, Cell phone and mobile tower radiation hazards, No public clipboards found for this slide, Student at Poona College of Pharmacy, Pune, Student at p.d.patel institue of applied science,CHARUSAT,Changa. 3. NMR Spectroscopy N.M.R. Only nuclei with spin number (I) >0 can absorb/emit electromagnetic radiation. You can change your ad preferences anytime. Indeed, light is electromagnetic radiation.Visible light forms a small part of the electromagnetic spectrum, a graphical representation of therelationship between frequency and wavelength in electromagnetic waves.Electromagnetic waves include radio waves, infrared, visible light, and gamma rays (there are a fewmore). Now customize the name of a clipboard to store your clips. Electromagnetic radiation impinging on a wall exerts a pressure P c that will be determined via a classical argument. Wavelength being defined as the distance, has the units of distance, i.e. EMR hasboth electric and magnetic field components, EMR carries energy—sometimes called radiant energy—through space continuously away from the source (this is not true of the near-field part of the EMfield). Electromagnetic radiation: The Electromagnetic radiation are considered as a waves of the energy. Note that 1 Hz = s −1. The wavelength provides a distance between two consecutive waves. • Spectroscopy is the study of the interaction between electromagnetic radiation and matter. The other types of electromagnetic radiation that makes the electromagnetic spectrum are microwaves, infrared light, gamma-rays, ultraviolet light and X-rays. Radiation is energy in the form of waves or particles that comes from a source and travels through space or through a medium. OR. For most spectroscopy, the wavelength of the radiation is large compared with the size … Excitation based on broadband-light sources in which the generation of the light is separated from the sample to be investigated provides a less perturbing means of excitation. Subject: Analytical chemistry. Name: Sana Shaikh. His laser spectroscopic investigations led him in turn to formulate nonlinear optics, a new theoretical approach to the analysis of how electromagnetic radiation interacts with matter. This electromagnetic spectrum ranges from very short wavelengths (including gamma and x-rays) to very long wavelengths (including microwaves and broadcast radio waves). So, the current area of electromagnetic radiation is that, it's a, [COUGH] it has both the properties of waves and particles. Molecular spectroscopy involves the interaction of materials with electromagnetic radiation in order to produce an absorption pattern (i.e. A molecule is characterized by the total energy resulting from these interacting forces. The speed of a wave is given by the equation,velocity = (wavelength) x (frequency)As you can see, wavelength and frequency are inversely proportional. The information is propagated by electromagnetic radiation at the velocity of light from thesource (earth surface) directly through free space or indirectly by reflection, scattering and radiation tothe sensor. The electromagnetic radiation is looked at as sinusoidal waves which are composed of acombination of two fields. So first of all, we're going to look at this more into the wave side of electromagnetic radiation. Radiation: Here, Radiation is defined broadly to include charged particles such as alpha α and beta β radiation.

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