Medical organizations recommend protecting your body from UV radiation by using sunscreen. Suggest a reason for this recommendation.

Sunscreens block or scatter UV rays.

Sunscreens contain antibodies to fight UV rays.

Sunscreens reflect or scatter UV rays present in sunlight.

Question

Medical organizations recommend protecting your body from UV radiation by using sunscreen. Suggest a reason for this recommendation.

    Sunscreens block or scatter UV rays.

    Sunscreens contain antibodies to fight UV rays.

    Sunscreens reflect or scatter UV rays present in sunlight.

goodkylekiller · Answer

ill be back on tomorrow

thomaster · Answer

They do not block UV rays, but reflect, scatter or absorb them.
Chemical sunscreens absorb the UV rays while physical sunscreens reflect or scatter them.

anonymous · Answer

I hate questions like this. Block is not a technical term, and blocking can be done through more than one way.

goodkylekiller · Answer

@Abhisar

abhisar · Answer

It will be absorb, in context of options given it should be A

anonymous · Answer

@abhisar Yeah, but it is a horrible question. After all, scattering is a description of the reflection/refraction.  You can reflect light in a controlled, tight beam or break it apart into wavelengths.  

Anyway, I wish the question writers would be more careful. You wouldn't believe how many times I have to fix things that I have to give to my students. For example, we cover tonicity very thoroughly but we do not bother to cover osmolarity.  Now, I have only partial control over what quizzes and tests are given, and every year quiz 1 of the second semester of intro has the term "hyperosmotic" used. The students have never seen it before and it is, in the question, treated as a synonym of "hypertonic", which it most definitely is not.