Exploring Light Absorption: What Happens When a Photon Hits an Electron?

In summary, the conversation discusses light absorption and how it relates to the behavior of electrons in atoms. The speaker expresses concern about potentially simplifying information and misrepresenting facts in their presentation. They then go on to explain that electrons do not orbit the nucleus in the same way as a planetary model, but instead occupy specific orbitals with a probability of being closer to the center. When light waves interact with these electrons, they must match the frequency of their energy to be absorbed or reflected. The speaker also clarifies that the electrons do not physically "jiggle" but rather have a static wave function. Finally, they mention that light does not have to match a specific frequency but rather an energy difference in order to be absorbed or reflected by
  • #1
Ivanov
8
0
Hello,
I have a presentation tomorrow and in a segment, I talk about light absorption. It's more conceptual than technical. I did quite a bit of research on the topic but because of simplifying information I may have butchered the facts and written something wrong. Could anyone please confirm/ deny and possibly give a few tips.

A photon does not pass on any energy unless it is absorbed and that requires a specific phenomenon.
*Sixth panel*
Electrons do not orbit the core similarly to a planetary model like we were taught so far. They inhabit specific orbitals with no fixed position, rather a probability that rises as it gets closer to the center.
*Seventh panel*
While they are there they jiggle with a constant frequency which corresponds to their energy. Imagine the electron like a bobber in a pond going up and down.
When the light wave comes in it has to match the frequency or it will be either reflected or transmitted.

The underlined sentence is what worries me the most. The quote itself represents a manuscript of what ill be saying.
Thank you very much in advance :)
 
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  • #2
While they are there they jiggle with a constant frequency which corresponds to their energy. Imagine the electron like a bobber in a pond going up and down.
They don't "jiggle". That is a common misconception. The wave function is static, it does not change with time. While it is possible (but not necessary) to have a time-dependent phase in the description, this phase is only a mathematical tool - it is nothing you could observe, not even in principle.

Light doesn't have to hit any frequency that would be represented in the atom. It has to match an energy difference between possible states of the atom (or the molecule, or metal, or whatever) to get absorbed or reflected, otherwise it just passes through.
 

1. What is light absorption?

Light absorption is the process in which photons, or particles of light, are absorbed by atoms or molecules. When a photon hits an electron in an atom, the energy from the photon is transferred to the electron, causing it to move to a higher energy state.

2. How does light absorption affect the color of objects?

The color of an object is determined by the wavelengths of light that are reflected or absorbed by its surface. When a photon of a certain wavelength is absorbed by an electron, it causes the electron to jump to a higher energy state and the photon's energy is converted into heat. The color of the object appears to be the color of the remaining wavelengths that are reflected.

3. What determines the amount of light absorption in a material?

The amount of light absorption in a material is determined by several factors, including the type of material, the number and arrangement of atoms or molecules, and the energy of the photons. Different materials have different levels of light absorption based on their atomic or molecular structure.

4. How does light absorption contribute to photosynthesis?

In photosynthesis, light absorption is essential for plants to convert light energy into chemical energy. Chlorophyll, the pigment responsible for absorbing light in plants, absorbs photons and uses their energy to power the chemical reactions that create glucose and oxygen.

5. Can light absorption be used in technology?

Yes, light absorption is used in various technologies such as solar cells, which convert light energy into electricity. It is also used in optical sensors and detectors, optical communication systems, and in the production of colored dyes and pigments.

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