Question

Microwave oven was introduced by

• A. Percy L Spencer
• B. Hurley machine company
• C. William hunt
• D. Christian huygens

Answer 1

Answer:

A. Percy L Spencer

• Microwave ovens pass microwave radiation through the food that produces heat in it.
• Water molecules are electric dipoles means it has a partial positive charge at one end and a partial negative charge at the other end.
• The microwave provides radiations of the frequency 2.5GHZ . They are non-ionizing electromagnetic waves and thus cannot ionize the water molecules present.
• So, the water molecules absorb energy from the electromagnetic waves. This results in an increase in the temperature of the water.
• Therefore, the water molecules undergo vibrational motion and transfer energy among them. This energy is heat.

        Water, fats, and other substances in food absorb microwave energy.