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The term ‘anomaly’ has been used in science to denote a phenomenon, which is completely out of the ordinary, and thus the initial observers do not immediately know its cause; often it takes the application of a combination of scientific theory and/or experimentation to find a probable explication. An example of this is ‘St. Elmo’s Fire’; a bluish glow, which appears on the ends of ships masts or airplane’s wings during storms. It wasn’t until the development of electrostatics that the cause of this was understood. (The very large charge in the storm clouds induces a similarly enormous opposite charge in the ground below. Because charge tend to accumulate on points, this charge is even greater in a ship’s mast (or other object). The potential difference between the two becomes enough to ionize the air around the object, and ionized air has a bluish tinge because this is the characteristic frequency of light given off by ionized oxygen/nitrogen, i.e. our atmosphere.)
This essay attempts to deal with a similar mystery, one which has only been noticeable for a short length of time, as the technology that gives rise to it did not exist in a form to allow notice of this phenomenon until this century. In 1940, Percy Spencer was walking by an experimental high frequency radio wave communications device when the chocolate bar in his pocket melted. Ten years later, microwave ovens came onto the market. Sometime after that, the following anomaly was observed. If a grape is placed in a microwave oven, sliced in two and spread (butterflied in such a way that the two hemispheres are directly beside each other and just touching, ideally with a small flap of skin still connecting them) and then the microwave is turned on, within seconds a spark/flame appears between the two halves. This seems bizarre, but has been observed by many different people and documented several places: on the Internet, on science question-and-answer periods on CBC, and probably by others, who haven’t bothered to publish their observations.
I have chosen to examine this occurrence for several reasons. The science show in question was not able to find a satisfactory answer to the question. In fact, no matter where I went or whom I asked, I have been unable to find an individual who could do more than hypothesize, and often not well, on the cause of these grapes’ behavior. Thus, it became somewhat of a personal challenge to be able to find a satisfactory explanation.
This essay consists of my attempt to treat this subject and is divided into the following three parts:
A more detailed description of phenomenon itself, and observations made when the experimental design elaborated modified; A theory pertaining to why this behavior is observed, based on both observations and knowledge of the physics involved in the setup; An evaluation of the validity of this theory and of the limitations present in the experimentation, and recommendations for further experiments which could further clarify the origins of this phenomenon.