If we want to measure the effects of microwave radiation on metal without relying on visual observations, we can utilize a few alternative methods:
Temperature measurement: One way to assess the impact of microwave radiation on metal is by measuring the temperature changes. Before placing the metal object in the microwave, measure its initial temperature using a non-contact infrared thermometer or a thermocouple. Then, microwave the metal for a specific duration and power level. Afterward, measure the final temperature of the metal again. Significant temperature changes could indicate the absorption of microwave energy by the metal.
Electrical conductivity measurement: Microwaves can induce electrical currents in conductive materials like metal. Using specialized equipment such as an impedance analyzer or a multimeter, you can measure the electrical conductivity of the metal before and after exposure to microwave radiation. Any noticeable changes in conductivity could suggest alterations in the metal due to the microwaves.
Magnetic field measurement: Microwaves produce a high-frequency electromagnetic field. By using a Gaussmeter or a similar device, you can measure the magnetic field strength near the metal object before and during exposure to microwaves. This can help identify any changes in the magnetic properties of the metal induced by the microwave radiation.
It's important to note that conducting experiments involving metal in a microwave can be hazardous and should be done with extreme caution, if at all. Microwaving metal objects can cause sparking, arcing, and potentially damage the microwave or pose a fire hazard. Always follow safety guidelines and manufacturer instructions when using a microwave.