Abstract
Effect of concentration of citric acid, alkaline, and salt solutions on microwave absorption/shield is reported. The experiments are divided into two parts. In the first part, the liquid solution is placed inside a microwave oven. With a constant power and within a fixed heating time-period, the temperature change of solution is recorded as the concentration of the solution is varied. In the second part, the liquid solutions are placed located 30 cm away from a microwave source. The purpose of the second experiment is to observe the shield effect for electromagnetic waves as the concentration of solution is varied. Finally, some materials, such as plywood, acrylic, and foam, are soaked in solutions with different concentration. We found the best shield effect can be achieved by soaking the plywood in the salt solution.
Published Version
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