Physics Period 7


Microwaves is a form of electromagnet radiation. Which have a variety of applications, including communications, radar and mostly used for cooking.

Microwaves are a form of electromagnetic radiation with wavelengths ranging from one meter to one millimeter; with frequencies between 300 MHz (100cm) and 300 GHz (0.1 cm).

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Interesting Facts

The cost of the first microwave was $5,000, and was monstrous, 6 feet tall (size of a refrigerator) and weighed nearly 750 pounds.

How a Microwave Oven Works


The man describes how a microwave oven heats food, and how the microwave vacuum tube (magnetron) generates radio frequencies that cause the water in food to rotate back and forth. He shows the standing wave inside the oven. He also shows how you can measure the wavelength with melted cheese. He wraps it up by describing how a magnetron generates radio waves.


In some cases microwaves relieve symptoms better than drugs. The use of microwaves is safer than surgery.

Microwaves can decrease air pollutants, disinfect hospital waste, improve dry cleaning solvents, and clean up contaminated soil.

Negative health impacts are microwave sickness, your first signs are low blood pressure and slow pulse. Another negative impact is microwaving food potentially destroys and takes away the life energy, giving the food completely dead and lifeless.