Reflectivity of Light Biology Lab

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KevinTse

January 16, 2006

Title: Reflectivity of Light

Part A

PLANNING A

Purpose: To calculate the percent of reflectivity of various colors. 

Problem:

Prediction:          

Experimental Design: Refer to Hand-out

Variables:

  1. Manipulated Variable:
  2. Responding Variable: 
  3. Controlled Variables: 

PLANNING B

Materials: Refer to Hand-out

                

Procedures: Refer to Hand-out

DATA COLLECTION        

        Evidence:

DATA PROCESSING AND PRESENTATION

Analysis:          Calculate the Percent Reflectivity (Albedo) of Each Color

        % Reflectivity = (Value for Paper)/(Value for Aluminum) x 100%

        % Reflectivityaluminum = (0.900)/(0.900) x 100% = 100%

                % Reflectivityblack = (0.420)/(0.900) x 100% = 46.67%

                % Reflectivitywhite = (0.864)/(0.900) x 100% = 96%

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                % Reflectivityred = (0.866)/(0.900) x 100% = 96.22%

                % Reflectivityblue = (0.744)/(0.900) x 100% = 82.67%

 

CONCLUSION AND EVALUATION

Conclusion: Through the findings of this experiment, different colors yield different percent of reflectivity.  

Evaluation:

  1. Which color, other than aluminum, has the highest reflectivity?

Of all the colors, red had the highest reflectivity next to aluminum.

  1. Which color has the lowest reflectivity?

Of all the colors, black had the lowest reflectivity.

  1. What materials might give a planet a high reflectivity or albedo? Explain.

Since aluminum gave the highest albedo, materials that are similar ...

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