Why does my beard look darker when longer?

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My beard looks all blond to begin with, but for some reason it looks darker as it gets longer. Why is that?
 

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TSN79 said:
My beard looks all blond to begin with, but for some reason it looks darker as it gets longer. Why is that?
Probably something to do with the way if reflects light, similar to how a rough wood surface looks lighter than a smooth wood surface:

upload_2018-2-7_18-51-3.png


upload_2018-2-7_18-53-22.png
 

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