Multiple choice

The principle underlying a microwave is similar to that used in

  1. heat generated by nuclear power

  2. thermal radiation

  3. radioactivity

  4. generation of electricity

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The principle underlying a microwave is similar to that used in thermal radiation. A microwave oven does emit thermal radiation to heat up food, which is also called infrared radiation. Microwave radiation is thermal radiation.