Chapter U5.116, Problem 4E

Interpretation Introduction

Interpretation:

The three materials that block UV radiation needs to be determined.

Concept introduction:

Ultraviolet rays are a form of electromagnetic radiation.

The wavelength ranges from 10 nm to 400 nm.

Sun is the strongest source of UV rays.

In hot summer day, these UV rays strike the earth directly from sun.

They are highly energetic and when they fall on human skin, they cause irritation, skin burns and may lead to skin cancers.

To protect ourselves from UV rays sun screen lotions, sun glasses, etc. should be used.

Answer to Problem 4E

Synthetic fabrics made of nylon, polyester, glass, polyvinyl chloride materials; Plexiglass, etc. can block UV radiation to maximum extent.

Explanation of Solution

For protection from UV rays, sunscreen lotions, sun glasses, etc. should be used.

Synthetic fabrics made of nylon, polyester, glass, polyvinyl chloride materials, Plexiglas, sun screen lotions containing zinc oxide, etc. can block UV radiation to maximum extent.

Conclusion

Thus, sun screen lotions, sun glasses and certain fabrics block the UV radiation to maximum extent.