Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

LPF Donation via Stripe | LPF Donation - Other Methods

Links below open in new window

ArcticMyst Security by Avery

405nm looks blue on white cotten

C

cmg5461

0
Joined
May 22, 2012
Messages
12
Points
0
Does anyone know why this happens? I've taken a wave physics course and I can't seem to figure it out o.o

It only happens on white cloth. Not dark cloth. Not white doors.
 





Blord

Blord

0
Joined
Dec 24, 2007
Messages
5,356
Points
0
The washing powder contains a chemical that is fluorescent. This means that it absorbs 'invisible' UV radiation and re-radiates it as 'visible' light. Therefore the washing will not only reflect visible light, but will also emit some 'extra' visible radiation. This means that white sheets almost appear to glow white if held in sunlight and are deemed to be 'whiter than white'.
 
C

cmg5461

0
Joined
May 22, 2012
Messages
12
Points
0
Blord said:
The washing powder contains a chemical that is fluorescent. This means that it absorbs 'invisible' UV radiation and re-radiates it as 'visible' light. Therefore the washing will not only reflect visible light, but will also emit some 'extra' visible radiation. This means that white sheets almost appear to glow white if held in sunlight and are deemed to be 'whiter than white'.
Click to expand...

Makes perfect sense, thank you!
 
You must log in or register to reply here.




Top