Radiant Energy To Thermal Energy Experiment
Simple Experiment for Converting Radiant Energy into Thermal Energy
I thought I would share a really simple but very cool science experiment to demonstrate Radiant Energy being converted into Thermal Energy.
** This post contains affiliate links and I will be compensated if you make a purchase after clicking on my links.**
First, let’s define radiant and thermal energy:
Radiant Energy = 1.
Thermal Energy = 2. Light energy in the form of heat
*Just a Note: You will be making fire so parental supervision is a must and this experiment is only appropriate for older students.*
For this radiant energy to thermal energy experiment you will need:
- a pie plate or cake pan
- a small piece of white paper
- a magnifying glass
- a glass of water
Your Goal In This Experiment
Your goal is to concentrate the radiant energy coming from the sun with the magnifying glass effectively converting the radiant energy into thermal energy. If you can heat the paper until it actually burns then you have successfully converted it into thermal energy.
Here is how it went for us.
We ripped off a small piece of paper and found a place where we had direct sunlight. We then placed the scrap in the pan and tried to focus the light with the magnifying glass into a tiny circle on the paper.
Once we had the light focused on a small dot on the paper it took less than a minute for the paper to begin to burn.
T loved this experiment. Anything that gets us outside he likes but he loves hands-on experiments and more importantly, he remembers the lessons so much more than if we had read about the experiment alone and not seen it in real life. So, Science was a success today!
Change Up This Experiment
Option: You can also use a piece of black paper and show them that it lights even faster. This demonstrates that black paper absorbs more light than white paper which reflects the most light.
Learn More with PBS Learning Media
If you are interested, you may check out this lesson from PBSLearningMedia which offers several great lessons on Thermal Energy Transfer. We use a lot of material from PBSLearningMedia in our homeschool.
Explore the three methods of thermal energy transfer: conduction, convection, and radiation, in this interactive from WGBH, through animations and real-life examples in Earth and space science, physical science, life science, and technology.
Finally, we love to hear from you. Have you tried this with your children yet? Do you have a great resource you would like to share? Please feel free to comment below.
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