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 (A)</p> Signup and view all the answers

Which spectroscopic technique is the application of quantum chemistry?

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

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

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

What is a photon?

<p>A quantum of radiation (D)</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 (A)</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 (D)</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 (B)</p> Signup and view all the answers

What is the lowest surface part of a wave called?

<p>Trough (B)</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 (A)</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. (C)</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 (B)</p> Signup and view all the answers

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

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

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

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

What is an alternative expression for Lambert's Law?

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

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

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

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

<p>Wavelength (A)</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 (A)</p> Signup and view all the answers

What is the unit of wave number?

<p>Centimeters (D)</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 (B)</p> Signup and view all the answers

What is the unit of frequency?

<p>Hertz (D)</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 (B)</p> Signup and view all the answers

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

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

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

<p>Molar absorptivity (A)</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 (D)</p> Signup and view all the answers

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

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

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