Analytic Essay

 Title Page

 Background Information

Lab Report

 Analytic Essay

 Display of Results

 Diagram

 Photographs

 Links

 Animation

 Enhancements

 Bibliography

 St. Matthew's Deep Website

 Our lab group learned about seeing colors underwater. One thing that we

learned was that when colors go deeper underwater or further away the color

fades to the viewer. Another thing that happens when the colors go farther

away is that the diver thinks that the object is twenty-five percent farther than

it really is. This is because of the term known as refraction. Refraction can be

defined as light going through water, and in the process it is being bent. This

means that anything that is close seems 25 percent closer, and anything far

away seems 25 percent farther than it really is. Two terms that explains why it

seems like the color fades underwater are scatter and absorption. Scatter keeps

some of the light from reaching the color card. Since light is what enables a

person to see, the color card was not seen as clearly. Absorption is just like it

sounds. It absorbs light underwater keeping it from reaching the color card.

Also, absorption only absorbs certain colors, and they are red, orange, green,

yellow, and blue; these were the colors that we used. This is another reason

why it was not as clear to see the color card underwater.

This experiment has much to do with scuba diving. Underwater you

usually have to distinguish between colors. For example, if you were

underwater and you were trying to find your partner, it would be important to

understand the changing of colors so you would not mistake him/her for

someone else. You would understand that certain colors fade underwater, and

you would find your partner by looking for the colors that do not fade.

There was one error that occurred in our lab. It was about our pictures.

After we took the pictures we developed them. But it was hard to see the color

because the pictures were taken in a shadow. This leads to another point. If we

could redesign the experiment we would have made some sort of object that

would have held the camera and the color cards in place. This would have

eliminated possible error in changing the distance at every single trial in the

experiment. Another thing that we would change in our lab would be to use a

better way to test the difference in the colors. The Adobe PhotoShop that we

used was not always accurate in the results.

If we had a longer time to do our experiment then we could have tested

out more colors. We would then see if the colors changed more or less than

the colors that we tested out. This would interest us much and it would expand

our knowledge of vision underwater. Another thing that we would have liked

to do if we had more time is to do our experiment in the sea. It would be

interesting to see how much the colors change in salt water opposed to

chlorine water. It would also give us a more real look about colors changing

underwater while scuba diving. Of course we could not do this because we are

not certified divers.

Our lab group learned many things from doing this experiment. One

thing that we had learned was the colors blue, red, orange, yellow, and green

becomes unclear underwater to the viewer. Another thing that we had learned

from this experiment was to always prepare the experiment very thoroughly.

By this we mean that you have to prepare for anything that could go wrong,

and to think of anything that you could do to make the lab better.

 Title Page

 Background Information

Lab Report

 Analytic Essay

 Display of Results

 Diagram

 Photographs

 Links

 Animation

 Enhancements

 Bibliography

 St. Matthew's Deep Website

Pictures from http://www.cosmic-wrench.com/jeff/photos/ocean2s.jpg