Question 1:
Which type of spectroscopy measures the absorption of light by a sample?
Explanation: The correct answer is A) Absorption spectroscopy. Absorption spectroscopy measures the absorption of light by a sample. It involves passing light through the sample and measuring the reduction in intensity at specific wavelengths, providing information about the sample's composition and molecular structure.
Question 2:
Which type of spectroscopy measures the light emitted by a sample after it is excited?
Explanation: The correct answer is B) Emission spectroscopy. Emission spectroscopy measures the light emitted by a sample after it is excited by an external energy source. It provides information about the excited state and energy transitions within the sample, allowing the identification of specific elements or compounds.
Question 3:
Which type of spectroscopy involves the scattering of light by a sample?
Explanation: The correct answer is C) Raman spectroscopy. Raman spectroscopy involves the scattering of light by a sample. It measures the change in energy (wavelength) of the scattered light, providing information about the vibrational and rotational modes of the sample's molecules and allowing the identification of chemical compounds.
Question 4:
Which type of spectroscopy uses X-rays to analyze the interaction between X-rays and matter?
Explanation: The correct answer is D) X-ray spectroscopy. X-ray spectroscopy uses X-rays to analyze the interaction between X-rays and matter. It provides information about the electronic structure, chemical composition, and crystallographic properties of a sample, making it useful in materials science, solid-state physics, and chemistry.
Question 5:
Which type of spectroscopy is used to identify the elemental composition of a sample?
Explanation: The correct answer is A) Absorption spectroscopy. Absorption spectroscopy, particularly in the ultraviolet-visible (UV-Vis) or infrared (IR) regions, is commonly used to identify the elemental composition of a sample. Different elements have characteristic absorption patterns, allowing for their identification and quantitative analysis.