bilby
Fair dinkum thinkum
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Nope, that's not it. That's not anything, because literally nobody is saying that "the object's wavelength/frequency (IMAGE) travels to the brain", and the parenthetical "(IMAGE)" is a bizarre non-sequitur.The only flaw is with the idea that the object's wavelength/frequency (IMAGE) travels to the brain rather than the brain looking through the eye to see the object itself. That's it.
Light reflects off objects, and travels to the brain.
Light consists of a number of photons; Each has a frequency that, for visible light, we call colour (in the US, "color").
As photons are constrained to travel at c, the frequency and wavelength of light become interchangeable; A photon of known frequency has a known wavelength and vice-versa.
Unless the object in question has a pure colour, or is illuminated by a pure colour source (such as a laser), the photons that reflect from it will have a wide range of individual frequencies, the average of which we call the colour(s) of the object's surface.
The pattern formed by these photons can be resolved into an image of the object. An image is a pattern on a plane through the straight-line path that light takes from object to that plane; By focussing the light through a lens, the pattern can be made to match the suface pattern of the object, and such a matching pattern is called an image of the object.
When a retina lies exactly on the focal plane of the lens, the pattern of light on the retinal cells matches the pattern of light on the surface of the object. If the retina is offset from the focal plane, then the image formed will be blurry, and will not match the pattern of the surface of the object - this can be corrected by interposing additional lenses to bring the focal plane more accurately onto the retina.
This is what you are denying. (It is also how spectacles and contact lenses work).
Now, please provide your similarly detailed description of what you are claiming.
How does "the brain [look] through the eye to see the object itself"? What role does light play in this, exactly?
How do spectacles or contact lenses enable the brain to look through the eye to see the object clearly, when it could not be seen clearly without them, and without light taking time to travel the (short but non-zero) distance from retina to lens?
In order for the mechanism you claim to supplant the mechanism you are denying, it must explain all of the things that we observe, including such phenomena as correcting vision with spectacles; And it must explain them as well as, or better than, our existing explanation, while also explaining something else that the existing explanation does not.
If it can't, it would be unreasonable to adopt a new explanation or to give credence to a new mechanism.