Question

How do mineral nanoparticles in sunscreens protect from UV radiation? Multiple Choice The particles scatter incoming UV light The particles absorb incoming UV light The particles dissolve with incoming UV light None of these choices are correct

Answer 1

Answer:

Step 1:

Option(a) and (b) are correct

a. the particles scatter incoming uv light

b.the particles absorb incoming uv light

Step 2: Explanation

There are two ways by which an active ingredient in sunscreen can protect the skin from harmful incoming UV exposure

i.e  Either by blocking the rays physically, or by absorbing them chemically.

Generally  zinc oxide and titanium dioxide, is more effective, because it reflects and scatters the UV radiation, preventing damage it could do to your skin.

Chemical absorbers also prevent the damage by absorbing the radiation and breaking down