If it is just light, then what do light wavelengths mean?
Colours. Different wavelengths of light are different colours.
That's all.
Nothing changes other than the brain using the eyes, as a window, to look through them to see the object.
OK, not only does that sentence not make a lot of actual sense, it also appears completely unrelated to the post it is quoting.
We aren't talking about changes in anything. We are talking about the meaning of the word "wavelength".
Wavelength, frequency, and colour, are (for light) different ways of describing the exact same thing.
Sorry if I didn't answer the question. I realize a wavelength, its frequency, and color are different ways of describing the same thing.
The wavelength is a property of a wave that is the distance between identical points between two successive waves. The distance between one crest (or trough) of one wave and the next is the wavelength of the wave. In equations, wavelength is indicated using
the Greek letter lambda (λ).
Wavelength Examples
The wavelength of light determines its color, and the wavelength of sound determines the pitch. The
wavelengths of visible light extend from about 700 nm (red) to 400 nm (violet). The wavelength of audible sound range from about 17 mm to 17 m. Wavelengths of audible sound are much longer than those of visible light.
Explore the definition of a wavelength in science and math together with examples and the equation of the length of wavelengths.
www.thoughtco.com
It cannot see the object without the wavelength, but it does not work the way science thinks.
It doesn't "work" at all.
If I look at an apple, it might be green. It would make exactly no sense whatsoever to say: "the eye cannot see the apple without the green, but it does not work the way science thinks". 'Science' doesn't think; Scientists don't think that colour is crucial to the operation of the eye, largely because it's obviously NOT - we see green apples exactly the same way that we see red apples. Wavelength is completely irrelevant within the visible portion of the EM spectrum, and we don't see light of other wavelengths at all.
That is the reason for this refutation.
What is? You haven't goven a reason for anything, nor do you appear to be talking about, much less refuting, the post to which this is apparently a response.
It amazes me how quickly people defend science yet they say science is never settled.
I am not defending science, I am pointing out the definition of the word "wavelength". If anything, I am defending vocabulary.
Go figure. Bilby said is something possible or is it not?
No, bilby said: "Colours. Different wavelengths of light are different colours. That's all".
Okay
In this case, it is possible that Lessans could be right because there is nothing so outrageous by these claims that would appear impossible such as flying elephants.
The question was "What do light wavelengths mean?", and Lessans cannot be right unless he said: "Different wavelengths of light are different colours".
Because that's a full, accurate, and complete answer to:
If it is just light, then what do light wavelengths mean?
This is all very interesting but he wasn't debating this.
Visible light waves are the only wavelengths of the electromagnetic spectrum that humans can see1. The human eye can detect wavelengths from 380 to 700 nanometers2. This portion of radiation is called "visible light"3.
Light waves across the electromagnetic spectrum behave in similar ways. When a light wave encounters an object, they are either transmitted, reflected, absorbed, refracted, polarized, diffracted, or scattered depending on the composition of the object and the wavelength of the light.
Specialized instruments onboard NASA spacecraft and airplanes collect data on how electromagnetic waves behave when they interact with matter. These data can reveal the physical and chemical composition of matter.
Light waves across the electromagnetic spectrum behave in similar ways. When a light wave encounters an object, they are either transmitted, reflected, absorbed, refracted, polarized, diffracted, or scattered depending on the composition of the object and the wavelength of the light. Specialized...
science.nasa.gov