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| Q. |
Which of the following is used in oven? |
| A. | X-rays |
| B. | UV rays |
| C. | Microwaves |
| D. | Radiowaves |
| Answer» C. Microwaves | |
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Explanation: An oven that uses micro radiation waves as a source of heat in order to cook food as opposed to a fire source. Conceptualized in 1946, Dr. Perry Spencer allegedly discovered the heating properties of microwaves while studying the magnetron. A microwave oven, often colloquially shortened to microwave, is a kitchen appliance that heats food by dielectric heating accomplished with radiation used to heat polarized molecules in food. |
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