A Raman spectrum of undoped GaAs at room temperature is performed with a 514.5 nm laser. The spectrum of scattered light exhibits peaks at wavelengths of 507.1 nm and 591.6 nm due to interaction of the incident light with LO phonons. Calculate the LO phonon frequency and the ratio of the intensity of scattered light at 507.1 nm to that at 591.6 nm.

Q: It is considered that a solid substance has an orthorhombic structure. Since the edges of the unit…

A: Edges of unit cell: a = 3.50 A b = 4.0 A c = 5.5 A Miller indices of plane for which diffraction is…

Q: Why are the peaks for both the IR and Raman spectra of chloroform at the same frequencies?

A: Chloroform is a molecule with three atoms: one carbon (C) and three hydrogen (H) atoms bound to a…

Q: What is involved in Phases l and Phases ll of biotransformation?

A: The reactions which are involved in phase I are as follows; 1. Hydrolysis 2. Reduction 3. Oxidation

Q: Diamond crystallises in a face-centred cubic structure with a = 3.5625 Å. Calculate the d-spacing…

A: The objective of this question is to determine the d spacing value and peak position. The synthesis…

Q: A reference UV Vis abrorption spectrum of the solvent alone, which is subtracted fram the spectrum…

A: We can find the concentration of a solution from its absorption value in the UV-Vis spectrum. More…

Q: Find information on fluorescent dye Fluo-3:

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: The arrangement of ions, atoms or molecules in crystals are best determined by which instrumental…

A: The arrangement of ions, atoms or molecules in crystals are best determined by x-ray diffraction…

Q: 7. Suppose you are an employee of a plastics firm and you are assigned the task of identifying a…

A: The infrared spectrum of a polymer or rubber is a profile of its absorption characteristics plotted…

Q: 5. Complete the following a) Do unwanted bands due to oxygen, nitrogen, water, and carbon dioxide in…

A: A question based on IR spectroscopy, which is to be accomplished.

Q: Describe the following scanning electron microscopy of powder micrographs of Co

A: Scanning electron microscope (SEM): It is a type of electron microscope.It is used to produce images…

Q: Determining the metallic composition of an alloy in the field Identification of a solid…

A: Analytical techniques refer to a wide range of methods and instruments used to obtain information…

Q: Why the concnetration with mol/dm^3 was used in kb calculations with no conversion to mol/m^3 to…

A: The conversion of unit depends on calculations.

Q: Briefly compare the advantages and disadvantages of Nujol mulls and KBr pellets for the analysis of…

A: Nujol mulls and KBr pellets are two common methods for preparing solid samples for infrared (IR)…

Q: An ethanol solution of 3.5 mg/100 ml of compound Y (150.0 g/mol) in a 1.00 cm quartz cell has an…

A: A  solution has : 3.5 mg / 100 ml  Molar mass = 150.0 g/mol. Path length = 1.00 cm  Molar extinction…

Q: In an x-ray diffraction measurement of BCC Nb, the observed angle (2Θ) for the (211) set of planes…

A:

Q: Lead is determined by atomic absorption at 283.3 nm, whereas it is determined at 405.8 nm by flame…

A: Atomic Absorption Spectroscopy- Atomic absorption is a technique used for detecting metals and…

Q: of 15 A sample is analysed using a UV-Vis spectrometer and its Transmittance recorded as 36%. What…

A: Given is, %T= 36% A=??

Q: Why would fluorescence anisotropy not be a useful method when working with a solid sample?

A: The method of fluorescence anisotropy is to analyze the changing orientation of a chemical molecule…

Q: The thickness b of very thin film can be determined by the IR interference fringe method. Such…

A: The thickness of polymer material is done by preparing a thin film and observing its infrared…

Q: An empty infrared cell showed 8.9 interference fringes in the wavelength range of 1894 to 2399 cm-1.…

A: The equation required to determine the path length of cell is as follows, b=∆N2ν1-ν2

Q: The next graph is 'Graphene's Optical Absorption Graph'. Explain why strong absorption is possible…

A: The objective of this question is to explain the absorption behavior in the  eV region and its…

Q: what is the wavenumber cm-1 and the type of bond/ funtional group?

A: The question is based on the concept of IR Spectroscopy. we have been given an IR spectra. we have…

Q: how many IR bands are there in PdL2Cl2?

A: We have to identify IR bands are there in PdL2Cl2 as follows in step 2:

Q: A molecular exclusion column has a diameter of 7.8 mm and a length of 30 cm. The solid portion of…

A: (a)

Spectroanalytical Methods

Spectroanalytical methods measure the wavelength and intensity of radiations that are either emitted or absorbed by a molecular or atomic species. These methods are useful for evaluating the electronic or atomic arrangement of the molecules of a given analyte.