Question

To a swimmer under water, objects look blurry. When goggles are worn, however, the images are sharp.

 

Why is this so?

Contact with water makes the focal length of the eye change.

The goggles have a focal length that corrects the vision of the swimmer.

The swimmer's eyes are adapted to refraction that takes place as light passes from the air into the cornea.

The goggles maintain this. The blurriness is caused by the water irritating the swimmers eyes. The goggles protect the swimmers eyes.

Answer 1

We know that when the swimmer is under the water the effect of refraction is predominant. So as he is under water for some time the eyes gets adapted to refraction. So the swimmer use goggles in order to reduce the effect due to refraction So the correct answer is The swimmers eyes are adjusted to refraction that takes place as light passes from air to cornea. The goggles maintain this.