I exist, therefore I say I exist.
But saying that does anything else, is the world dictated by quantum theory? If I turn my back from a window and look back a moment later will everything still be there? If I put a man in a room and split the room in two will he still be in both halves... or will he be in two halves, or will he be in two halves in both halves of the room?
The questions are endless so just stop asking them!
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Originally Posted by Grey
Certainly they do, since they change the quality of the light. Moreover, froma quantum perspective, photons are absorbed and re-emitted as they pass through a medium. The photons that you see are not the same ones that were emitted by the object, and might be changed in their qualities (such as polarization, for example, by a filter).
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Or enlarged?
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The lens has a negative refractive index and can be used to image structures with a resolution that is about one sixth the wavelength of light -- thus overcoming the so-called diffraction limit.
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Richard. Looking at an object doesn't mean you see an object. Similarly touching something doesn't mean you are physically touching it as it's just an illusion, the electrons in my body and in my desk prevent me from passing my hand through it and I never actually 'touch' it, but if my body was made of electrically neutral particles (lets just say I wouldn't fall apart for now) I could pass my hand through the desk, through myself and more dangerously through the floor.
Looking at myself in a mirror I see myself. Or I see the reflected light that was filtered by my body because my skin and clothing and hair only re-emit certain colours so the mirror that then re-emits the photons can only emit the photons of the same colour. I don't see me I see my Colour filtered photons. Also the silver in the back of a mirror strips out certain wavelengths of the spectrum,
See Here. I have a blue top on right now that would be missing some photons from its colour.