Home Page

Background

Lab Report

Analytic Essay

Results

Diagram

Bibliography

Links

Animations

Enhancements

Photographs

Photographs2

 

 Problem Statement

How is focus effected the deeper you go underwater in a pool?

 

  Method and Materials

 

MATERIALS:

A piece of wood 10ft x 2in (x2)
A piece of wood 2ft x 2in (x5)
Corner bracket (L shaped) (x9)
Straight bracket (x2)
An underwater camera (x2)
Duct Tape
A 10ft vision chart (laminated)
Scuba equipment (x2)
A 15ft (at least) tape measure
Pins (x14)

 

METHOD:

You place both of the 10ft long boards 16in apart. At each end you place a 2ft x 2in in order to complete the frame. This should give you a rectangular shaped base with a hollow center. Then at one end attach a 2ft x 2in board vertically for the camera to be attached to, and at the other you will need to put 2 boardsv ertically for the vision chart.



After all of this is assembled it is then necessary to carry out the experiment. At intervals of two feet we take a picture on the camera. There is no need to look through the lens because the height has been worked out. You only need to click the button. This is continued until you reach 14 feet. This makes a total of 7 pictures. We are able to measure these depths by doing it along side a tape measure running along the side of the pool from the surface to the bottom. Once all of the photos are taken you need to get the pictures developed. When developed you need to crop the image of the vision chart and blow it up to actual size. This way, you should have a total of 8 vision charts (one being the original of "perfect" clarity). This is where the key part of the experiment occurs. You need to take several people each with different vision capabilities. For instance, take a person with perfect 20/20 vision and have him/her assess each vision chart at each different depth. The idea behind this is whether or not he will have the same vision as they did on the regular vision chart.

Below is the finished project:

 

Hypothesis

 

The chart and graph below show our predicted results. We believe that as a person goes deeper his vision becomes more and more impaired. We have used a ranking system on a scale of 1-8 for people to measure the amount of blur. This can be seen below.

The other chart is our prediction of our other set of data. This set of data shows what the person's vision would be at the various different depths. We showed again our thought that a persons vision gets worse as he/she gets deeper.

 This is a chart of our hypothesized results; it shows that the deeper you go the more blur there is.

 

 It was not possible to graph the digits 20/x where x is the number that indicates how good the person's vision is. However, it was not important to show both of these numbers so we just took the important one. Our hypothesis was the same for each person so we only graphed one.

 Conclusion

From our results it is not safe to draw a conclusion. Our results have proved to be inconclusive due to margin of error and the way that our experiment was carried out. Even though our results may suggest that vision gets better as you go deeper, this does not make sense scientifically.

 Back To Top

 

 

 Home Page

Background

Lab Report

Analytic Essay

Results

Diagram

Bibliography

Links

Animations

Enhancements

Photographs

Photographs2