(PRESS SPACE) Hey. It's been a while. I've decided to re-share this project because I was remembering how hard I worked on it. Enjoy! (This is from two or three years ago, please don't judge! :) So, Here's a clearer explanation on what to do: 1. Prepare- Set out a work station that includes: A Table cover to protect your work surfaces, Paper and pencil or whiteboard, bag of marshmallows, square pan, chopstick, toothpicks or pieces of paper, and a microwave. That doesn't have a *turn table (Some are removable) 2. Write down- So, the speed of light = frequency x wavelength. (Microwaves travel at the speed of light, so that's why this is possible) The frequency is written on the side of the microwave, usually in MHz. (Megahertz) So you have the Frequency, so your equation is almost half done. 3. Marshmallows- set your marshmallows in your tray, so that every marshmallow is touching another. 4. Microwave- Set your microwave on low, because we don't want the marshmallows to explode.(That does happen) Take then out when done. 5. Poke- Poke around the marshmallows with a chopstick. You will find that some marshmallows are really gooey, and others have hardly melted at all. This is because some places have lots of energy and other spots have hardly any at all. Mark the gooey places with tooth picks or ripped up pieces of paper. 6. Measure- Measure between all the spots that are gooey, then find the average. This is half a wavelength long, so multiply by two to get a wavelength. 7. Multiply- You have now completed your equation! Now all you have to do is multiply to find the answer! It isn't going to be exact, but it still will be pretty close! If you still can't figure out how to do it, check out this video, witch tells you how to do it in a much better way than I did: https://www.youtube.com/watch?v=HwREvdUWSKE Lots of credit to @Barrelrider for editing it, and doing some artwork and scripts, so make sure to follow him! To this video:https://www.youtube.com/watch?v=HwREvdUWSKE It inspired me to do this, and yes, I did do this and it works. Credit to my teacher for showing us the video!