Microwave oven
device · 1947 · Digital age
Heating food with microwaves (Spencer).
Inventor: Percy Spencer.
What it is made of
- Magnetron — has part. The magnetron generates the microwaves.
Principles and materials it uses
- Dielectric heating — uses. The field heats the water in the food.
- Steel — is made of. The chamber is steel, which also shields the waves.
History: what it evolved from and what it influenced
- Radar — was inspired by. Spencer noticed the heating while working with radar magnetrons.
What it is a kind of
- Household appliance — is a kind of. A household appliance.