Question UV and cardboard

[gamer87]

Does cardboard reflect or absorb UV present in indirect sunlight?

 

[John Cuthber]

Given the yellowish colour of that card, I would say it will absorb UV .
If it was white card (or maybe blue) I'd expect it to reflect it.
The problem is that you can't see UV so it's hard to tell

[gamer87]

The inside of the box because the outside has boxes of different colors

[studiot]

Indirect sunlight  ?

 

[gamer87]

yes, clarity in home

[studiot]

1 minute ago, gamer87 said:

yes, clarity in home

I asked because any indirect sunlight must be reflected off something.

As a consequence indirect sunlight may contain reduced, greatly reduced or even on UV.

Edited August 26, 2020 by studiot

[gamer87]

lights enter in home no dirrect sunlight, enter and contact this cardboard box trflect in cardboar and go inside box or not?

[John Cuthber]

None of that box will reflect UV well.
Did you understand this bit of what I said?
 

26 minutes ago, John Cuthber said:

If it was white card (or maybe blue) I'd expect it to reflect it.

 

[gamer87]

I was referring to the color of the inner part of the box because all the cardboard boxes I own have the same internal color but it varies in the external colors so the UV reflects, is it abbreviated by the box? what happens?