Absorbing Light: What Determines Reflected vs Absorbed Photons?

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In summary, the conversation discusses the concept of color perception, explaining that it is determined by the frequencies of light that are reflected by objects. The chemical structure of a substance plays a crucial role in this process, as certain atoms and molecules have the ability to absorb or reflect specific frequencies of light. This is further explained through the example of larger molecules and their specific modes of vibration or rotation that can influence the color of an object. The conversation also offers a website for further reading on the topic.
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Matrixman13
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I understand that what we perceive as color is really just certain frequencies of light that are reflected by objects. But what determines what frequencies are absorbed and which ones are reflected.
 
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The chemical structure of the substance. Some atoms directly absorb certain frequencies of light, because their electron structures provide a transition with matching energy. Larger molecules have specific modes of vibration or rotation that can absorb frequencies or ranges of frequencies. Indeed, specific parts of large organic molecules are responsible for specific kinds of coloring.

Here's a good website to get you started:

http://www.chm.bris.ac.uk/webprojects2002/price/colour.htm

- Warren
 

1. What is the difference between reflected and absorbed photons?

Reflected photons are light particles that bounce off a surface without being absorbed, while absorbed photons are light particles that are taken in by a surface and converted into another form of energy.

2. What determines whether photons are reflected or absorbed?

The reflection or absorption of photons is determined by the properties of the surface they encounter, such as its color, texture, and chemical composition.

3. How does the color of a surface affect the absorption and reflection of photons?

The color of a surface is determined by the wavelengths of light it reflects. A surface that appears white reflects most of the light that hits it, while a black surface absorbs most of the light that hits it.

4. Can the angle at which light hits a surface affect the reflection and absorption of photons?

Yes, the angle at which light hits a surface can affect the reflection and absorption of photons. This is known as the angle of incidence, and it is determined by the angle at which the light strikes the surface.

5. How does the texture of a surface impact the reflection and absorption of photons?

The texture of a surface can affect the reflection and absorption of photons by changing the angle of incidence and the surface area of the material that the light interacts with. A rough surface can scatter light in multiple directions, while a smooth surface can reflect light in a more uniform direction.

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