Lab Report

Title: The Effects of Absorption Underwater
Problem Statement:
How does the amount of the color red in the object that you are looking at vary as the depth underwater increases?


picture 5 feet 10 feet 14 feet
color chart 120 mr 100 mr 81 mr
picture of rat90 mr 72 mr

note: "mr" stands for measurement of red

Method and Materials:

- one 25' measuring tape that locks in place
- one wood board 1'' x 6'' x 48''
- one under water camera that can go 14' deep
- one clear clipboard
- duct tape
- one color chart
- one picture of "Justin, radio repair-rat", which you can find at the website:
- one computer
- one scanner

First, duct tape the underwater camera to one end of the wood board, and the clear clipboard to the other (so that the camera is aimed directly at the front of the clipboard, and the board's height is 1''). Next, pull 14' out of the measuring tape, lock it in place, and lower it into the water so that the 14' mark is on the bottom (you may need to add on a certain amount of feet, depending on where you drop the measuring tape). Then, go underwater at the depths of about five feet, ten feet, and fourteen feet, and take pictures of the color chart and "Justin, radio repair-rat" (we only went down five feet and ten feet when taking pictures of the rat). Last, develop your pictures, scan them into a computer, and measure the amount of red in each one.



picture 5 feet 10 feet 14 feet
color chart 190 mr 143 mr 100 mr
picture of rat105 mr 76 mr

note: "mr" stands for measurement of red

Conclusion: In conclusion, as the depth increases, the amount of the color red increases.