SPF Means .
What are Ultraviolet radiation & what Sunscreens Screen do ??.
Sunscreen filters the light from the sun so that less of it reaches the deeper layers of your skin. Like a screen door, some light penetrates, but not as much as if the door wasn't present. Sunblock, on the other hand, reflects or scatters the light away so that it doesn't reach the skin at all.
The portion of the sunlight that is filtered or blocked is ultraviolet radiation . There are three regions of ultraviolet light.
These organic molecules in sunscreen absorb the ultraviolet radiation and release it as heat.
Who should use sunscreen?
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