Conceptual question: how do we even see objects?

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Homework Help Overview

The discussion revolves around the nature of light and how we perceive objects, specifically focusing on the electromagnetic radiation and wave optics involved in image formation through mirrors and lenses. The original poster expresses confusion about the fundamental process of seeing objects and the role of light in this phenomenon.

Discussion Character

  • Exploratory, Conceptual clarification

Approaches and Questions Raised

  • The original poster questions the origin of rays in ray diagrams and whether these rays come from the object itself. They propose that objects absorb solar radiation and reflect some light, which then travels to mirrors and is reflected to the observer's eyes. Other participants confirm this understanding and discuss the concepts of absorption and reflection in relation to color perception.

Discussion Status

The discussion is ongoing, with participants exploring the complexities of how we see objects and the processes involved in light interaction. Some guidance has been provided regarding the absorption and reflection of light, but the conversation remains open-ended without a definitive conclusion.

Contextual Notes

The original poster notes that this question was not thoroughly covered in their textbook, indicating a potential gap in their learning resources regarding the foundational aspects of optics and perception.

johnj7
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In my physics class we are learning about the EM radiation/wave nature of light/wave optics / image formation by mirrors and lenses, and I had a general question that was not really discussed in the textbook.
I understand the "technical aspects" such as understanding the equations and concepts/ how images are formed with mirrors and lenses etc, but what is exactly going on with the objects? How do we even see things in the first place?
seems like a dumb question, but I'm not sure of the answer

for example, suppose we have an object and a convex mirror
for the ray diagram we would draw rays coming from the object and reflecting off the mirror, forming an image.
are these rays coming from the object? where do these rays come from?
is the answer that the object absorbs solar radiation but doesn't absorb all the light, then the light that isn't absorbed by the object travels to the mirror and is reflected off?

thank you!
 
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As far as I can tell that is correct. The light from the sun hit's the object. The object absorbs some of the light. The rest is reflected off of it and then will hit the mirrors surface which will in turn reflect the light to your eyes...thus you see the object.
 
johnj7 said:
In my physics class we are learning about the EM radiation/wave nature of light/wave optics / image formation by mirrors and lenses, and I had a general question that was not really discussed in the textbook.
I understand the "technical aspects" such as understanding the equations and concepts/ how images are formed with mirrors and lenses etc, but what is exactly going on with the objects? How do we even see things in the first place?
seems like a dumb question, but I'm not sure of the answer

for example, suppose we have an object and a convex mirror
for the ray diagram we would draw rays coming from the object and reflecting off the mirror, forming an image.
are these rays coming from the object? where do these rays come from?
is the answer that the object absorbs solar radiation but doesn't absorb all the light, then the light that isn't absorbed by the object travels to the mirror and is reflected off?

thank you!

What you have described is absorption/reflection and is how objects project color. White reflects all the light, black then little. But of course how we actually see - process photons, perceive relationships, integrate images, structure, etc is a much more complicated organic process than appropriate for here.
 
pretty much
 

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