Science Buddies: "Ask an Expert"

Hello i'm going to be conducting this project and i have a question about the last step in the procedures. It says graph the number of photons emitted relative to the black square, where the black square is 100 percent, and the other squares are relative to this standard. I'm really confused by this step and i'm not sure how to create the graph from this info please help.

Hi Brittany321,

I’m assuming that you are working on the project described here:

https://www.sciencebuddies.org/science- ... ml#summary

To calculate the number of photons emitted relative to the black square, divide the number of photons emitted by each colored square by the number for the black square. Then multiply each result by 100%.
You’ll end up with different percentage values for the white, yellow, blue and red squares. Of course the black square will be 100%.

A bar chart will work very well for this type of data. The percentages will be the bar heights and each of the colored squares will be represented by a bar. The following link has some examples and information on making bar charts.

https://www.mathsisfun.com/data/bar-graphs.html

I hope this helps. Please post again if you have more questions.

A. Norman