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Questions and Answers
In spectroscopy, which type of excitation occurs when a photon of light possesses exactly the amount of energy to promote a vibrational excitation?
In spectroscopy, which type of excitation occurs when a photon of light possesses exactly the amount of energy to promote a vibrational excitation?
- Vibrational excitation (correct)
- Rotational excitation
- Translational excitation
- Electronic excitation
What happens when a molecule is irradiated with electromagnetic radiation (EMR) in infrared (IR) spectroscopy?
What happens when a molecule is irradiated with electromagnetic radiation (EMR) in infrared (IR) spectroscopy?
- It undergoes rotational excitation
- It undergoes electronic excitation
- It absorbs energy matching the frequency of its vibration (correct)
- It emits energy matching the frequency of its vibration
What does each frequency absorbed by a molecule correspond to in the context of infrared (IR) spectroscopy?
What does each frequency absorbed by a molecule correspond to in the context of infrared (IR) spectroscopy?
- A specific nuclear motion
- A specific molecular motion (correct)
- A specific atomic motion
- A specific electronic motion
What is the nature of the energy levels for the rotation of a molecule?
What is the nature of the energy levels for the rotation of a molecule?
What does quantum mechanics state about the energy of a molecule?
What does quantum mechanics state about the energy of a molecule?
Which property of electromagnetic radiation is defined as the number of wavelengths that pass a particular point in space per unit time?
Which property of electromagnetic radiation is defined as the number of wavelengths that pass a particular point in space per unit time?
What is the wavenumber of electromagnetic radiation defined as?
What is the wavenumber of electromagnetic radiation defined as?
When viewed as a particle, electromagnetic radiation consists of packets of energy called:
When viewed as a particle, electromagnetic radiation consists of packets of energy called:
What is directly proportional to the energy of each photon?
What is directly proportional to the energy of each photon?
What exhibits both wave-like properties and particle-like properties?
What exhibits both wave-like properties and particle-like properties?
