Are the eyes an example of the photoelectric effect

In summary, the conversation discusses the possibility of the eyes functioning through the photoelectric effect. However, it is clarified that the eyes actually work through chemical processes involving opsins and the photoelectric effect is not a general term for light conversion. The suggestion is made to research the actual process of how the eyes work before making assumptions. A helpful resource is provided for further information.
  • #1
dshea
21
0
It seems to me that the eyes are an example of the photoelectric effect at work. If so, which is more effective; current technology, photosynthesis, or our eyes?
 
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  • #2
dshea said:
It seems to me that the eyes are an example of the photoelectric effect at work.

Except that they aren't. Our eyes work by chemical processes involving a protein family called opsins.
 
  • #3
So the photon's are not being converted into electrical energy? Or is the photoelectric effect being expressed by the opsins? It seems to me that light is being converted to electricity that our brain interprets.
 
  • #4
the photoelectric effect is not an umbrella term for the conversion of light into movements of electrons. It is the physics of a very specific scattering effect. From what little I know about how the eyes see the work voltage, retarding potential, etc. have nothing to do with it.
 
  • #5
This is not the way to hold a conversation: writing down incorrect things that "seem to you" to be true, and yet are not. I would start by reading up on how the eye actually does work before posting about how you think it must work.
 
  • #6
Good point. Can you point me in the right direction?
 

1. What is the photoelectric effect?

The photoelectric effect is a phenomenon where certain materials emit electrons when exposed to light of a specific frequency or above a certain threshold frequency. It was first observed by Heinrich Hertz in 1887 and later explained by Albert Einstein in 1905.

2. How are eyes an example of the photoelectric effect?

The eyes contain cells called photoreceptors that are sensitive to light. When light enters the eye, it is absorbed by these cells, which then emit electrons through the photoelectric effect. These electrons are then converted into electrical signals that are sent to the brain, allowing us to see.

3. What is the role of frequency in the photoelectric effect?

The photoelectric effect is dependent on the frequency of light. If the frequency of light is below a certain threshold, no electrons will be emitted. However, if the frequency is equal to or above the threshold, electrons will be emitted with greater energy as the frequency increases.

4. How does the intensity of light affect the photoelectric effect?

The intensity of light does not directly affect the photoelectric effect, but it does impact the number of electrons emitted. Higher intensity light will cause more electrons to be emitted, but the energy of each electron will remain the same as long as the frequency is constant.

5. Can the photoelectric effect be observed in everyday life?

Yes, the photoelectric effect can be observed in everyday life in devices such as solar panels, digital cameras, and photocopiers. These devices use the photoelectric effect to convert light into electricity or to capture images through the emission of electrons.

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