Question:
Microwave oven was introduced by
APercy L Spencer
BHurley machine company
CWilliam hunt
DChristian huygens
Answer:
A. Percy L Spencer
Explanation:
- 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.