MLA Citation: Bloomfield, Louis A. "Question 1491"
How Everything Works 19 Oct 2017. 19 Oct 2017 <http://howeverythingworks.org/print1.php?QNum=1491>.
1491. I am planning to do an experiment with a microwave oven and want to videotape it. I want to operate the microwave oven with the door open. Will I be safe if I'm 15 feet away? Will opening the door nullify the "chamber" effect that the oven normally has? - E
Don't operate the oven open. You're just asking for trouble. The oven will emit between 500 and 1100 watts of microwaves, depending on its rating, and you don't need to be exposed to such intense microwaves. The chamber effect is important; without the sealed chamber, the microwaves pass through the food only about once before heading off into the kitchen and you. The food won't cook well and you'll be bathed in the glow from a kilowatt source of invisible "light."

Imagine standing in front of a 10-kilowatt light bulb (which emits about 1 kilowatt of visible light and the rest is other forms of heat) and then imagine that you can't see light at all and can only feel it when it is causing potential damage. Would you feel safe? Your video camera won't enjoy the microwave exposure, either.

If you want to videotape your experiments without having to view them through the metal mesh on the door, you can consider drilling a small hole in the side of the cooking chamber. If you keep the hole's diameter to a few millimeters, the microwaves will not leak out. Then put one of the tiny inexpensive video cameras that widely available a centimeter or so away from that hole. You should get a nice unobstructed view of the cooking process without risking life and limb.


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