PSL280H1 Lecture Notes - Lecture 3: Marine Mammal, Refraction
Document Summary
I(cid:374) (cid:272)apti(cid:448)ity they do(cid:374)"t use e(cid:272)holo(cid:272)atio(cid:374), they use their (cid:448)isio(cid:374) (cid:373)ore. The tears protect the eye from the salt water. Light has to travel in certain wavelengths for us to be able to see it. Since water is denser than air, light travels slower in water. Light goes thru the atmosphere almost unchanged unless it hits something. It can be absorbed by things like algae. Dolphins have less use of their echolocation in captivity because they have greater vision in captivity. Vetations and pnnnipeds only need to get 1 light rsy to determine the colour. Dichromatic means they need 2 light rays to determine the colour. They have to contract skeletal muscles to open the blowhole.
