History of Spectroscopy

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?

Erwin Schrödinger (A) Signup and view all the answers

Which spectroscopic technique is the application of quantum chemistry?

Spectroscopic technique (B) Signup and view all the answers

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

Qualitative analysis (B) Signup and view all the answers

What is a photon?

A quantum of radiation (D) 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?

Dispersion (A) Signup and view all the answers

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

$3 \times 10^{10}$ cm/sec (D) Signup and view all the answers

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

380 nm to 760 nm (B) Signup and view all the answers

What is the lowest surface part of a wave called?

Trough (B) Signup and view all the answers

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

The splitting of light into its component colors (A) Signup and view all the answers

What does Lambert's Law describe?

The decrease in intensity of radiation with thickness of the solution is directly proportional to the intensity of the incident light. (C) Signup and view all the answers

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

Concentration of the solution (B) Signup and view all the answers

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

Decrease in intensity of radiation (B) Signup and view all the answers

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

Concentration of the solution (D) Signup and view all the answers

What is an alternative expression for Lambert's Law?

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

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

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

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

Wavelength (A) Signup and view all the answers

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

Frequency is inversely proportional to wavelength (A) Signup and view all the answers

What is the unit of wave number?

Centimeters (D) Signup and view all the answers

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

Energy is directly proportional to frequency (B) Signup and view all the answers

What is the unit of frequency?

Hertz (D) Signup and view all the answers

What is the purpose of an absorption spectrum?

To measure the amount of light absorbed by a sample (B) Signup and view all the answers

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

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

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

Molar absorptivity (A) Signup and view all the answers

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

When the solute and solvent do not form complexes (D) Signup and view all the answers

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

$A = \log \frac{I_o}{I}$ (A) 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?

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