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History of Spectroscopy
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History of Spectroscopy

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Questions and Answers

Who is best known for their work on gravity?

  • Lise Meitner
  • Erwin Schrödinger
  • Sir Isaac Newton (correct)
  • Albert Einstein
  • What unit of measurement is named after Ångstrom?

  • Kilogram
  • Second
  • Meter
  • Ångstrom (correct)
  • Who was heavily involved in nuclear fission research?

  • Albert Einstein
  • Bunsen
  • Lise Meitner (correct)
  • Erwin Schrödinger
  • Who is responsible for Schrödinger's equation?

    <p>Erwin Schrödinger</p> Signup and view all the answers

    Which spectroscopic technique is the application of quantum chemistry?

    <p>Spectroscopic technique</p> Signup and view all the answers

    What is the main application of UV spectrophotometry in the pharmaceutical industry?

    <p>Qualitative analysis</p> Signup and view all the answers

    What is a photon?

    <p>A quantum of radiation</p> Signup and view all the answers

    What is the phenomenon called when visible light is split up into seven colors by passing through a prism?

    <p>Dispersion</p> Signup and view all the answers

    What is the velocity at which all types of radiations mentioned travel?

    <p>$3 \times 10^{10}$ cm/sec</p> Signup and view all the answers

    What is the wavelength range of visible light according to the text?

    <p>380 nm to 760 nm</p> Signup and view all the answers

    What is the lowest surface part of a wave called?

    <p>Trough</p> Signup and view all the answers

    What does the term 'dispersion' refer to in optics?

    <p>The splitting of light into its component colors</p> Signup and view all the answers

    What does Lambert's Law describe?

    <p>The decrease in intensity of radiation with thickness of the solution is directly proportional to the intensity of the incident light.</p> Signup and view all the answers

    Which parameter does Beer's Law consider in addition to incident light intensity?

    <p>Concentration of the solution</p> Signup and view all the answers

    What does the symbol '𝑑𝐼' represent in Lambert's Law?

    <p>Decrease in intensity of radiation</p> Signup and view all the answers

    In Beer's Law, what is '𝐾 ′′' in the proportionality constant?

    <p>Concentration of the solution</p> Signup and view all the answers

    What is an alternative expression for Lambert's Law?

    <p>$ln(𝐼) = 𝐾 ′ 𝑙$</p> Signup and view all the answers

    By combining Lambert’s Law and Beer’s Law, which law can be formulated?

    <p>$I_0 ln = 𝐾 ′ 𝐾 ′′ 𝐶$</p> Signup and view all the answers

    What is the common unit used in UV and IR spectroscopy?

    <p>Wavelength</p> Signup and view all the answers

    What is the relationship between frequency and wavelength of electromagnetic radiation?

    <p>Frequency is inversely proportional to wavelength</p> Signup and view all the answers

    What is the unit of wave number?

    <p>Centimeters</p> Signup and view all the answers

    What is the relationship between energy and frequency of electromagnetic radiation?

    <p>Energy is directly proportional to frequency</p> Signup and view all the answers

    What is the unit of frequency?

    <p>Hertz</p> Signup and view all the answers

    What is the purpose of an absorption spectrum?

    <p>To measure the amount of light absorbed by a sample</p> Signup and view all the answers

    What is the formula used to calculate the absorbance (A) according to the Beer-Lambert Law?

    <p>$A = \log \frac{I_o}{I}$</p> Signup and view all the answers

    What is the meaning of the symbol $\varepsilon$ in the Beer-Lambert Law?

    <p>Molar absorptivity</p> Signup and view all the answers

    Which of the following is NOT a limitation of the Beer-Lambert Law?

    <p>When the solute and solvent do not form complexes</p> Signup and view all the answers

    Which of the following equations represents the Beer-Lambert Law in terms of intensities?

    <p>$A = \log \frac{I_o}{I}$</p> Signup and view all the answers

    What is the relationship between the absorbance (A) and the ratio of incident intensity $I_o$ to transmitted intensity $I$ according to the Beer-Lambert Law?

    <p>$A = \log \frac{I_o}{I}$</p> Signup and view all the answers

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