Which of the following best describes the primary use of a spectroscope in quantum mechanics?

• A. To measure the mass of subatomic particles
• B. To observe the motion of electrons in an atom directly
• C. To determine the temperature of a chemical reaction
• D. To analyze the wavelengths of light emitted or absorbed by substances

Answer: (D)

Verified step by step guidance

1. Understand that a spectroscope is an instrument used to separate and measure different wavelengths of light emitted or absorbed by substances.
2. Recognize that in quantum mechanics, electrons in atoms occupy discrete energy levels, and transitions between these levels involve absorption or emission of light at specific wavelengths.
3. Know that by analyzing the wavelengths of light with a spectroscope, scientists can infer information about the energy levels and electronic structure of atoms or molecules.
4. Note that the spectroscope does not measure mass of particles, nor does it directly observe electron motion or determine temperature, but rather it provides spectral data related to energy transitions.
5. Conclude that the primary use of a spectroscope in quantum mechanics is to analyze the wavelengths of light emitted or absorbed by substances, which helps in understanding atomic and molecular structure.