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This becomes a question about the resolution of the human eye, not one of general physical principles. If you cared about how close something has to be for our eye to make out its dimensions accurately, you should have asked a question about peoples eyes from the very start. Posing the question as two light-emitting objects without eyes in makes it sound like a question of the fundamental properties of light. Which is it?
When an object moves away from us it relatively visual contracts to the eye, the light that we did see in 3 dimensional form of the object becomes 0 dimensional over a distance away..., a thread with zero diameter. ... there is nothing in range to see
Quote from: TheBoxWhen an object moves away from us it relatively visual contracts to the eye, the light that we did see in 3 dimensional form of the object becomes 0 dimensional over a distance away..., a thread with zero diameter. ... there is nothing in range to seeWhen an object is close, you can perceive it as a 3-dimensional object because of binocular vision. But this only works out to about 5m, after which it is effectively 2-dimensional (although, if it is a familiar object, your brain can fill in the third dimension).See: https://en.wikipedia.org/wiki/StereopsisThe angular resolution of the human eye is about 0.02 degrees. When an object subtends less than this angle, it effectively decreases to a point. It appears zero-dimensional.See: https://en.wikipedia.org/wiki/Naked_eye#Basic_accuraciesBut humans can see things that are farther than this. The star Sirius subtends an angle of 0.006 seconds = 0.0001 minutes = 0.000002 degrees. According to this theory, it should be zero-dimensional and invisible; and yet it is easily visible as one of the brightest stars in the night sky.See: https://en.wikipedia.org/wiki/Angular_diameter#Use_in_astronomy
You said infinite, surely my ideas have premise to argue with the teacher.
Quote from: TheBoxYou said infinite, surely my ideas have premise to argue with the teacher.In these last few posts, I think you have drifted off towards infinity and beyond...