why is it possible to focus clearly on objects underwater when ur eyes are underwater if u wear goggles with plane glasses in them , but not with naked eyes????????????
2006-09-17 18:40:51 · 5 answers · asked by me_ 3 in Science & Mathematics ➔ Physics
Water has a higher refractive index than air. Light entering the eye from the water behaves differently than light entering from air. This creates a distortion that affects normal vision. Diving masks and diving helmets solve this problem by creating an air partition between the diver's eyes and the water. The distortion created by the water is effectively reversed as the light travels from water to air.
Divers who require corrective lenses to see clearly outside the water would normally require the same prescription while wearing a mask. Some masks can be ground to the diver's prescription to avoid the need for additional corrective lenses.
2006-09-17 18:53:36 · answer #1 · answered by amandeep s 3 · 0⤊ 0⤋
Because you have no pressure on the eyes when the goggles are on causing the eyes to focus easier
2006-09-18 01:49:40 · answer #2 · answered by Anonymous · 0⤊ 0⤋
The water bubble hits the naked eyes blinding them whereas wearing glasses prevents the bubbles forming on the eyes as they enabling you to see.
2006-09-18 01:49:45 · answer #3 · answered by ssmindia 6 · 0⤊ 0⤋
Ucan't keep u'r eye oepen 4 much time under water to focuss.
to avoid distubance we use goggles.
2006-09-19 04:59:34 · answer #4 · answered by anamika 1 · 0⤊ 0⤋
I agree with all the above given answers and u know wat - I had asked my physics proffessor the same question wen I was in 11th std.
2006-09-18 19:33:25 · answer #5 · answered by simi 2 · 0⤊ 0⤋