Explain whether the following statements are true or false. When the primary electron beam in the SEM is defocussed to get an electron beam of higher intensity and larger spot size to improve secondary electron signal generated from the specimen, the spatial resolution of the secondary electron image will also be higher.

Q: Match the spectrophotometry term with its description. describes the relationship between the sample…

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Q: By what factor will you change the concentration as you monitor the absorbance/transmittance of the…

A: The term absorbance refers to the measure of the quantity of light which has been absorbed by the…

Q: There are advantages and disadvantages to decreasing the monochromator slit width. Select the…

A: Monochromator is a part of instruments which selectively allows particular band of wavelengths.

Q: a) Briefly explain why IR spectroscopic data is reported in wavenumbers and not absorbance or…

A: Absorbance A= - log T = ξ c l = 2- log (%T) Where T = transmittance , C= concentration ,l = path…

Q: energy transition water for wavelength at 375nm absorbance

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Q: Why is it important to determine λmax and take absorbance readings of the standards and the sample…

A: The solution is given below -

Q: An absorption vs wave length plot shows that a given species has a maximum absorption at wavelength…

A: The wavelength at which absorbance is highest is the wavelength to which the solution is most…

Q: Each individual part in an atomic absorption spectrophotometer has a specific function. Below is…

A: Atomic Absorption Spectroscopy is a technique of qualitative analysis of chemical elements using the…

Q: Flame test is an example of whatb type of atomic spectroscopy? Emmsion Absorption Fluorescence…

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Q: The Rydberg constant depends on the mass of thenucleus. What is the difference in wavenumbers of the…

A: The formula used to calculate the wave number is as follows: Wave number = Rz2×1n12-1n22 where, R =…

Q: Do the wavelengths (at the highest % transmittance) match to the color of the solution in the…

A: In the highest transmittance, the weave length of the light does not math with color with solutions…

Q: Determine whether an interference pattern is observed on the other side of the slits in experiment.…

A: When a gun is fired at a solid wall having two closely spaced slits whether or not there would be…

Q: Calculate the limit of quantification in ppm, given that the limit of detection is 0.048 ppm. Report…

A: Given  Limit of detection ( LOD ) = 0.048ppm

Q: Explain why is it necessary to Intergate the intensity of the peak before you plot it on the…

A: SOLUTION   The integrated intensity in corresponding space emerging from a specific pinnacle is…

Q: what is the frequency of light in Hz, with a wavelength of 489.1 nm? USE CORRECT ROUNDING AND SIG…

A: Given , wavelength = 489.1 nm

Q: Using the ε value obtained from the gradient of an absorbance vs concentration plot, how would you…

A: When the radiation is 50% absorbed and 50% transmitted,  %T = 50% A=-logT=-log(50100)=0.301

Q: are the essential ents för any optical spectroscopic instrument?

A: The essential components for any optical spectroscopic instrument are 1.Source 2.sample cell…

Q: why Calibration curve for agiven specie s at a fixe wavelength will become more non- linear at…

A: Lambert Beer Law According to Lambert Beer Law, the absorbance is directly proportional to…

Q: Force Completion Once started, this test must be completed in one sitting. Do not leave t Remaining…

A: Wavenumber is given by,

Q: What atomization systems are in Atomic Fluorescence Spectrometers?

A: Atomization refers to breaking bonds in some substance to obtain its constituent atoms in gas phase

Q: Circle the structure that would have the longest wavelength in the ultravoilet spectrum and box the…

A: Number of conjugation in alkene is directly proportional to the wavelength and inversely…

Q: wavenumbers

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Q: light

A: This question is related to excited state.

Q: energy transition acetoritricle for wavelength at 575nm absorbance

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Q: ___________Beer's Law can be applied to what spectroscopic techniques?   All choices are correct…

A: Beers law states that the absorbance (A) is proportional to the concentration (C) and  path length…

Q: Atomic absorption spectroscopy was used to determine the amount of aluminum in a sample of…

A: The measured blank values are: 0.0073, 0.0082, 0.0110, 0.0101, 0.0102, 0.0098, and 0.0090 AU number…

Q: In an atomic absorption spectrum experiment, Linsey treated a gaseous He+ sample in first excited…

A: Uv Range is 200-400nm.So spectra is in UV range. Light range is 100 nm To 300nm. energy of photon…

Q: Absorbance can be found by taking the negative log of: O The intensity of the transmitted light…

A: Note: As per our guidelines, we are supposed to answer only one question. Please repost the…

Q: the

A: Wavelength = speed of light / ( frequency )  Wavelength = length of the box  So,  Length of the box…

Q: A transparent colorful solution is placed in a spectrometer vial with a diameter of 1.5 cm. When…

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Q: The absorbance of a mixture at a specified wavelength is the total of the absorbances of each…

A: We have to tell whether the given statement on addit8ve property of absorbance 8s true or false

Q: The ff. statements are true, EXCEPT: 1. If the wavelength is doubled, the energy is halved. II. If…

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Q: A light beam (2=325 nm) is shined on a certain metal surface. If the workfunction (4) of this metal…

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Q: What are the basic principles on which Atomic Fluorescence Spectroscopy is based?

A: The basic principles on which atomic fluorescence spectroscopy is based has to be given.

Q: (a) Draw a block diagram of an atomic absorption spectrometer (AAS). Briefly describe the function…

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Q: Briefly describe how a phase-contrast microscope work and the kind of image that it produces. Give a…

A: Phase-contrast microscopy generates an image by using the different refractive indexes and densities…

Q: A spectrophotometer has basic several components. Describe the role of each component and the…

A: Components of spectrophotometer: There are four basic components to a spectrophotometer; a light…

Q: Which of the the following is false regarding spectrophotometry?   A. The concentration of a…

A: The concentration of a sample in a solution is measured using spectrophotometer. It observes the…

Q: Determine whether an interference pattern is observed on the other side of the slits in experiment.…

A: In this electron does not show the interference pattern because in the presence of light electron…

Q: How can you convert the wavelength to wavenumber and absorbance to transmittance?

A: Absorbance is a term used to determine the light absorbing quantity (by Beer-Lambert law).  The rays…

Q: What makes the electron beam in magnetic deflection mass spectrometer?

A: Mass spectrometry is used to identify the molecular mass of the unknown organic compounds.

Q: Which of the following is the purpose of beam splitter in double beam photometer or colorimeter? O…

A: Double beam spectrophotometer is used to compare the light intensity of light of reference sample…

Q: If you had a sample which contained both copper ion and cobalt ion, what wavelength ranges would you…

A: Copper ion and cobalt ion are both transition metal ions.Most of the transition metals form colored…

Q: Does an electromagnetic spectrophotometer using photoelectron spectroscopy exist? Explain why or why…

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Q: A student calibrated the mini-spectrophotometer with a blank solution, and then went to check their…

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Q: Explain how the signal is modulated in fluoresence

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Q: What is main difference between a single beam and a double beam spectrophotometer? (b) What light…

A: A) Single beam spectrometer:it is utilised one beam of light that passes through the sample and the…

Q: Answer the question concisely. Maximum of 5 sentences. Differentiate spectroscopy and…

A: Spectroscopy is a branch of science and it deals with the study of interaction of electromagnetic…