Atomic Energy Levels and Absorption
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Questions and Answers

What occurs during the process of absorption in an atom?

  • An electron emits a photon and drops to a lower energy level.
  • An electron absorbs a photon and transitions to a higher energy level. (correct)
  • An electron remains unchanged in energy level.
  • An electron loses energy and becomes neutral.

    • Which condition must be met for absorption to occur?

  • The frequency of the photon must be greater than the energy difference between levels.
  • Absorption occurs irrespective of the energy level difference.
  • The frequency of the incident radiation must equal the energy difference divided by Planck's constant. (correct)
  • The energy levels must be equal for the process to happen.

    • What happens if the frequency of the incident radiation does not satisfy the absorption condition?

  • The atom emits energy instead of absorbing it.
  • The energy levels of the atom change permanently.
  • The electron gets excited but does not transition to a higher level.
  • The atom becomes transparent to the incident radiation. (correct)

    • What does the equation $𝝑 = \frac{𝑬_2 - 𝑬_1}{𝒉}$ represent in the context of absorption?

    <p>The relationship between energy levels and photon frequency.</p> Signup and view all the answers

    Which statement describes what occurs during excitation?

    <p>An electron absorbs energy and transitions to a higher energy state.</p> Signup and view all the answers

    Study Notes

    Interaction of Incident Radiation with Atoms

    • Incident radiation can interact with atomic energy levels in three main ways, with absorption being one of them.

    Absorption

    • Absorption occurs when a lower energy level electron (ground state or a lower excited state) captures a photon of specific energy.
    • This process causes the electron to transition to a higher energy level.
    • The condition for absorption is defined by the equation:
      [ \nu = \frac{E_2 - E_1}{h} ]
      where:
      • ( E_2 ) = higher energy level
      • ( E_1 ) = lower energy level
      • ( h ) = Planck’s constant
    • If the frequency of the incident radiation does not meet this condition, the material will be transparent to the radiation.
    • No interaction occurs when the incident photon does not match the energy difference between the two levels.

    Key Concepts

    • Absorption is also referred to as excitation within atomic physics.
    • Proper matching of photon energy and electron energy levels is crucial for absorption to occur.

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    Description

    Explore the mechanisms of how incident radiation interacts with atomic energy levels, specifically focusing on absorption. This quiz covers key concepts such as electron transitions from lower to higher energy states and the conditions necessary for absorption to occur.

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