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Main Question or Discussion Point
Does it have an aura, or is the aura just a refraction defect of air?
The wavelengths are very small, so it looks like particles to your eyes, i.e. it's photons hitting your eyes and not waves.But then, if light as a wave... how come we can see everything perfectly defined (assuming perfect vision/photography), even stars that are light years away are not blurry at all, and visible as a dot at any given point, whereas waves are supposed to spread
I'm gonna confine myself to what we know from wave/EM optics, since I'm not really qualified to comment on the nature of the photon.But then, if light as a wave... how come we can see everything perfectly defined (assuming perfect vision/photography), even stars that are light years away are not blurry at all, and visible as a dot at any given point, whereas waves are supposed to spread
But then, if light as a wave... how come we can see everything perfectly defined (assuming perfect vision/photography), even stars that are light years away are not blurry at all, and visible as a dot at any given point, whereas waves are supposed to spread
You are forgetting what lenses do. A useful rule of thumb is that the optical field at the back focal plane of a lens is the Fourier transform of the field at the front pupil plane (and vice-versa). Thus, the light impinging on the Earth from a star is indeed nearly a plane wave, so a lens will focus the light to a point (more accurately, an Airy function, but that's too advanced right now).But then, if light as a wave... how come we can see everything perfectly defined (assuming perfect vision/photography), even stars that are light years away are not blurry at all, and visible as a dot at any given point, whereas waves are supposed to spread