Question

The primary function of a mask is to____________.

1) Magnify the appearance of objects under water.
2) Cover the nose, to prevent water from entering.
3) Create an air space in front of the eyes, enabling them to focus.
4) None of the above.

Answer 1

The primary function of a mask is to create an air space in front of the eyes, enabling clear vision underwater.

Step-by-step explanation:

The primary function of a mask is to create an air space in front of the eyes, enabling them to focus.

When you open your eyes while swimming underwater, your vision becomes blurry because of the difference in refractive indices between air and water.

However, a face mask allows you to see clearly underwater by providing an air space in front of your eyes, allowing them to focus properly.