Why is the edge of the light from my flashlight beam so blurry?

  • Thread starter somega
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  • #1
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dd.JPG

On the photo you can see:

Red 1: the edge is very sharp (as expected)
Red 2: the edge is very blurry (but why?)

Same for green.

You can also see (Red 2) that the blurry edge is yellow.

What is this effect called?
 

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  • #2
A.T.
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