Microwave ovens are sold at all home appliance stores, such as Sears, Home Depot, Best Buy, Walmart, Ikea, etc. They are often also sold at furniture stores, in the kitchen section.
The first microwave ovens were sold in 1960, but they did not become widely used until the late 1980s.
38 years
Microwave Ovens
Over 900trillion are sold each year!
This is not a question, but I will tell you they were sold and in use by the mid 70's. The first ones were expensive.
No, microwave ovens are extremely popular in Japan.
Yes, microwave ovens use electromagnetic radiation.
Some features of cheap microwave ovens are that they can cook things at very high temperatures and some newer microwave ovens even have a convection feaure on them.
No.
No, microwave ovens don't have a standard length. They come in different sizes.
There are no radioactive materials in microwave ovens: they use microwaves to cook food and heat liquids.
Researching the way people use microwave ovens to determine how to improve their design