Physics

posted by .

In the process of fluorescence, an atom ab-
sorbs a photon of ultraviolet light and emits
two or more photons of visible light.
Is the reverse process possible? (That is, is
it possible for an atom to absorb a photon of
visible light and emit photons of ultraviolet
light?)

1. Yes; ultraviolet photons have less energy
than visible light.
2. No; ultraviolet photons have more energy
than the visible light.
3. Yes; the energy is equal;
4. More information is needed.
5. None of these

  • Physics -

    Ultraviolet photons have more energy than visible photons. A single visible photon cannot excite the upper energy level needed to get ultraviolet light out.

    At the very high intensities of some focused lasers, multiphoton absorption of visible light IS possible, with resulting ultraviolet emission, but it is not a common occurrence in nature.

    They probably expect answer 2.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Science

    in the process called Fluorescence, some substances absorb photons of one kind of radiation, and give out photons of a different kind. When infrared radiation falls on these materials, visable light is not emitted. Why not?
  2. science

    In the process called fluorescence, some substances absorb photons of one kind of radiation (e.g) ultraviolet radiation), and give out photons of a different kind (e.g visible light). When infrared radiation falls on these materials, …
  3. Quantum Physics

    How is it a substance can emit photons of visible light after absorbing ultra violet photons but not with infrared radiation The re-emitted photons must be of lessor energy (longer wavelength) than the incident photons. In a one-photon …
  4. physics

    You are shining ultraviolet light on a gas of an unknown element. You know that an electron starts in a ground state with an energy of -19.10 eV. The electron absorbs a 4.00-eV photon. The electron immediately drops to an intermediate …
  5. Chemistry

    An atom emits a photon of light with a wavelength of 566 nanometers. How much energy has the atom lost?
  6. physics

    A laundry detergent contains a three-level quantum system ("whitener") which absorbs ultraviolet light at 273 nm. It emits light at 597 nm as part of a two-step process . What is the wavelength of the second emission process?
  7. physics

    If a 80 lightbulb emits 4.0 of the input energy as visible light (average wavelength 550 ) uniformly in all directions, estimate how many photons per second of visible light will strike the pupil (4.0 diameter) of the eye of an observer …
  8. ha

    An atom emits a photon of wavelength 1.08 meters. What is the energy change occurring in the atom due to this emission?
  9. physics

    How many photons of visible light result if a 60-keV x-ray photon is converted into green visible light with 10% efficiency?
  10. Physical Science

    A transparent object made of glass without any color (A) absorbs all frequencies of visible light and re-emits them from atom to atom through the object. (B) absorbs all frequencies of visible light and transforms the energy into thermal …

More Similar Questions