To be scientifically correct, neither does the existence of light depend on the presence of darkness (since darkness is just the absence of light, the converse argument applies: without darkness there'd be nothing but light) nor does the length of you shadow depend on the distance to the light source, but only the angle, the light hits you with.
Though in all seriousness I was looking at it more from a conceptual point of view, instead of the factual one presented. Yes darkness is the absence of light, but what is the concept of light without darkness? As for the shadows portion, it is not solely based off the angle light hits you, it is also the size and position of the light source. Since there are no scientific constants for these, it's safe to assume that ones distance from a light source can be considered a factor to change the size of ones shadow. At least Thats the way I like to look at it, but too each their own I suppose
First: I consider the question 'What is the concept of light without darkness?' as philosophical. Light is per definition electromagnetic radiation or to be more precise the wavelengths of electromagnetic radiation human eyes are able to detect. Darkness is still the absence of radiation. A question about how'd we know what light means if there was no darkness is irrelevant. Second: You are right, at least partially. This is my bad and I apologize. Indeed dimension and position of as well as distance from a light source change the dimensions of a shadow casted - since the angle of light depends on these factors.
I guess I look at light and darkness a lot more phillisophically then I initially thought, but I enjoy your standpoint ok the concepts, and I thank you for sharing
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