When exposed to the sun, why does your skin darken but your hair lighten?


by wasteofo2
Tags: darken, exposed, hair, lighten, skin
wasteofo2
wasteofo2 is offline
#1
Jul10-04, 07:08 PM
wasteofo2's Avatar
P: 1,522
I know that when your skin is exposed to alot of sunlight it turns darker in order to try to absorb some of the light's energy, which can help avoid burns, but why does your hair become blonde?
Phys.Org News Partner Biology news on Phys.org
Stanford researchers rethink 'natural' habitat for wildlife
Plants with dormant seeds give rise to more species
Researchers successfully clone adult human stem cells
Monique
Monique is offline
#2
Jul11-04, 05:03 AM
Emeritus
Sci Advisor
PF Gold
Monique's Avatar
P: 4,613
Because the pigment in the hair breaks down under influence of the UV light, and since hair is dead no new pigment can be made.
MathematicalPhysicist
MathematicalPhysicist is online now
#3
Jul11-04, 07:28 AM
P: 3,173
Quote Quote by Monique
Because the pigment in the hair breaks down under influence of the UV light, and since hair is dead no new pigment can be made.
doesnt this mean the hair should turn to white and not blonde?

Monique
Monique is offline
#4
Jul11-04, 08:03 AM
Emeritus
Sci Advisor
PF Gold
Monique's Avatar
P: 4,613

When exposed to the sun, why does your skin darken but your hair lighten?


White is the complete lack of pigment, blonde hair has very light pigment, the UV rays aren't strong enough to completely degrade all the pigment, so the hair will just become lighter than it originally was.
MathematicalPhysicist
MathematicalPhysicist is online now
#5
Jul11-04, 08:32 AM
P: 3,173
so (a little bit offtopic) which hair has the strongest pigment: black or ginger?

i go for ginger :surprise:
Kerrie
Kerrie is offline
#6
Jul11-04, 10:09 AM
Emeritus
PF Gold
Kerrie's Avatar
P: 1,188
it's ironic too because this tan look with sun kissed highlights is a look most women (and some men too) strive for, thus keeping the tanning salons and hair salons in business...


Register to reply

Related Discussions
Medical Myths Exposed Medical Sciences 16
Nuns of the Sisterhood Exposed General Discussion 28
Long Hair or Short Hair? General Discussion 64
Conversations: Bigfoot Exposed! General Discussion 3