Today’s class we are working with other group, each of us have to do two experiments that other group created.

I did my two experiments on Fuel Cell and Radiation in colors. So I am going to write about what I did on one of the experiments – Radiation in colors.

Sometimes during summer I wonder why my hair (black color) is always warmer than those people who have blond hair?

This experiment shows how colors will effect on the temperature.

 

Introduction

Different surfaces with colors will give us different affect on the temperature change. In a green house people use the color glass to absorb the temperature from the Sun and the purposed of the color glass is to maintain the temperature inside the green house with out escaping temperature. This lab we are going to see how much the temperature will change under different cover with different colors.

Materials

4 Thermometers with clear cases

a lamp

4 different color of markers

a timer

Procedure

1. Before we start we need to “reset” all the thermometers into room temperature. Doing so we quickly swing each thermometer back and forth, beware of surroundings.

We found out that the room temperature was around 27 C. This is our initial temperature.

     one of the instructor is resetting the thermometer.

2. We can now choose what colors that we want to put on the cases so we will have nice color covers for the thermometer.

We choose Red, Green, Blue, and Black.

3. After we colored each case with different marker we place it under the lamp which is our heat source. We place it under the lamp for about 30 minutes and each 5 minute I recorded the temperature.

 when 4 thermometer is under the heat source

4. Record all the data and compare the result with different color covers.

Result

min	5	10	15	20	25	30
Green	28	30.8	32	34.6	36.8	38
Blue	29	31	33.5	35	37.9	39.5
Red	28.5	30	31.5	33	34.8	36.7
Black	30	34	38	40	41	42

As you can see the color black absorb the whole spectrum from the white light but it does not reflect any energy. This means it gets hotter faster and it gets the highest temperature than any other thermometers, this also means that it gets colder faster when there is now heat source. The color black has the extreme change on the temperature it can absorb most heat in short time also can release most of the heat in a short period of time. The result also shows the Green color also efficient to be in a house because it can absorb and reflect  radiation so it keeps the thermal radiation inside the area longer and warms up the area faster. But the color green will not be like the color black, color green actually can keep the heat inside the area. So it keeps warm longer than other colors.

Conclusion

This lab is fun we get to do other groups’ experiment and interact with other classmate. I learned a lot at different group experiment such as the fruits battery and fuel cell which might be the future of our energy source. The radiation and absorption in colors actually proof that colors effect the heating process, and the thermal energy can be used to warm the house faster and longer.