9. Quantum Mechanics

The Energy of Light

Multiple Choice
Which process is most directly driven by light energy?
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Multiple Choice
Which best explains what happens when an electron moves from an excited state to the ground state?
Multiple Choice
What is the energy of a single photon of light that has a frequency of 2.30 × 10^{17} Hz? (Use Planck's constant h = 6.626 × 10^{-34} J·s.)
Multiple Choice
What is observed when all colors of visible light are absorbed by an object?
Multiple Choice
Which of the following statements correctly describes how energy is absorbed by an atom?
Multiple Choice
Why do different elements produce distinct colors in the flame test?
Multiple Choice
What is the energy in kJ/mol of photons with a wavelength of 450 nm?
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Multiple Choice
Which of the following processes is most directly driven by light energy?
Multiple Choice
Which of the following photons carries the smallest amount of energy?
Multiple Choice
Which term describes the smallest packet of electromagnetic energy that can be absorbed or emitted?
Multiple Choice
Calculate the energy (in nJ) of a photon emitted by a mercury lamp with a frequency of 6.88 x 10¹⁴ Hz.
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Multiple Choice
Which of the following correctly describes the relationship used to calculate the energy of a photon?
Multiple Choice
Which of the following best describes the relationship between the energy of a photon and its frequency?
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Open Question
How much energy is contained in 1 mol of each of the following?
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Multiple Choice
A light ray has a wavelength that is 835 µm contains 6.32 x 10^-3 J of energy. How many photons does this light ray have?
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