Invention of the Microwave

1234567891011121314
Across
  1. 3. Who invented the magnetron?
  2. 6. Who discovered the magnetron's heating power?
  3. 8. After a contest to name the invention, what one word did they decide on?
  4. 10. Why doesn't glass, ceramic, or plastic heat up in a microwave?
  5. 11. How many thousands did the first microwave cost?
  6. 13. What melted in Percy Spencer's pocket when he walked by a magnetron tube?
  7. 14. In 1977 what percentage of homes had a microwave?
Down
  1. 1. What did Raytheon do to the magnetron so a microwave that could fit on kitchen counter?
  2. 2. What are the tubes that produce microwaves?
  3. 4. Who introduced the first microwave oven targeted to “average” customers?
  4. 5. The name of the invention they patented was the high frequency ________ heating apparatus
  5. 6. What keeps microwaves from escaping the oven while it's cooking food?
  6. 7. Why did Raytheon have so many magnetron tubes? (two words)
  7. 9. What is in food that microwaves heat?
  8. 11. By 1988, what percentage of food products were microwavable?
  9. 12. What did Percy Spencer explode before Raytheon gave the OK to go forward with microwaves?