Using a Microwave Oven to Measure the Speed of Light

helpme2011

For this lab, I'm supposed to use materials that heat up but doesn't allow heat to transfer. I've used raw spaghetti noodles already but I still a few more for more trials.
So what materials are good for this lab? after heating up the material, I measure the distance between the "hot spots" so I can deduce the wavelength of the standing wave ( I have no clue what that means) and from that determine the speed of light.

Is this enough information for someone to help me?

micromass

Use a chocolate bar. The distance between the molten parts are indicating the wavelength.

helpme2011

I've also tried egg white! I need at least two more materials I think.

Pengwuino

I think you read the lab manual incorrectly.

MisterX

Microwave ovens may have a "stirrer" to distrupt the standing wave pattern. Are you being provided with a microwave especially for this experiment?