Quiz on the Theory of Raman Spectroscopy

Who first observed Raman scattering experimentally?

• A. A. Smekal

• D. Albert Einstein

• B. C. V. Raman

• C. K. S. Krishnan

What is required for a vibrational mode to be Raman active?

• B. Change in polarizability of the molecule

• A. Change in mass of the molecule

• C. Change in temperature

• D. Change in pressure

What type of scattering occurs without a change in energy state?

• D. Anti-Stokes scattering

• C. Stokes scattering

• A. Raman scattering

• B. Rayleigh scattering

What happens to the intensity of anti-Stokes scattering with increasing wavenumber shift?

• D. Fluctuates randomly

• C. Remains constant

• B. Decreases rapidly

• A. Increases rapidly

According to classical theory, what is primarily considered in light scattering phenomena?

• D. Thermal energy

• B. Magnetic dipole moment

• C. Gravitational effects

• A. Induced electric dipole moment

In quantum mechanical treatment, what is emitted or absorbed during a transition?

• A. Electrons

• D. Protons

• C. Neutrons

• B. Photons

What is the condition for Stokes Raman scattering?

• D. Δv = 2

• C. Δv = -1

• B. Δv = 1

• A. Δv = 0

Which of the following is a requirement for Raman activity according to group theory?

• C. Energy levels must be equal

• B. Symmetry species must match

• D. Molecule must be in a gas state

• A. Transition moment must be zero

What does the polarizability tensor describe in the context of Raman spectroscopy?

• C. Molecular symmetry

• B. Energy levels

• D. Electric field interactions

• A. Vibrational frequencies

What is the primary application of Raman spectroscopy mentioned in the text?

• D. Observing chemical reactions

• C. Measuring temperature changes

• B. Analyzing vibrational structures of molecules

• A. Studying electronic structures