How come we can see a source of light extremely far away when the source only illuminates the area much closer to it?

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For example, I’m sitting on my front porch which overlooks the town. Miles away I can see streetlights, signs, etc. How does the source project light to my location, yet doesn’t illuminate my location?

Holy moly friends, thanks for the awards and stuff. I didn’t think this question would spark so much interest, lol. I am thoroughly grateful for all your replies.

In: Physics

22 Answers

Anonymous 0 Comments

Make a dot on a piece of paper. It represents the source of light. Now draw lines from the dot outward. Draw them as densely as possible. They represent light travelling in all directions from the source. Notice how much darker the area around the dot is. It’s the same principle, only it’s light.

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