9) ULTRAVIOLET LIGHT Flashcards
1
Q
What is UV and where is it found
A
UV is high energy light found in sunlight
2
Q
What can exposure to UV cause
A
Bonds in molecules to be broken causing free radicals
3
Q
What effects does UV have on the human body
A
Causes sunburn and ageing of skin as proteins in the skin are broken down
4
Q
What do we use to prevent the damage from UV and why
A
Use sunblock.
Sunblock stops UV light reaching through the skin as it reflects UV
5
Q
What are free radicals
A
Highly reactive Atoms or groups of atoms which have a single unpaired electron
6
Q
Name the steps in the life of a free radical
A
Initiation
Propagation
Termination
