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The maximum allowed leakage of microwave radiation from a microwave oven is 5.0 mW/cm2.

If microwave radiation outside an oven has the maximum value, what is the amplitude of the oscillating electric field?

E0= ? and units?

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B. Haranadh Kumar
B. Haranadh KumarLv10
25 Sep 2020

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

A typical cell phone, which transmits microwaves, can have anoutput power as high as 2.0 W.

(a) Approximating the cell phone as a point source thatradiates evenly in all directions, calculate the radiationintensity of a cell phone at a distance of 2.00 in. which is theapproximate distance from your cell phone to your brain. Convertinches to whatever metric units you need, and give your answer inmilliwatts/cm2.

(b) The U.S. Food and Drug Administration limits the radiationleakage of microwave ovens to no more than 5.0 mW/cm2 at a distanceof 2.00 in. How does your answer above compare with the maximumallowable power density leaking from a microwave oven? (Answer asthe ratio of cellphone power / microwave power.)

The microwaves in a certain microwave oven have a wavelength of 12.2 cm.

a) How wide must this oven be so that it will contain five antinodal planes of the electric field along its width in the standing wave pattern?

b) What is the frequency of these microwaves?

c) Suppose a manufacturing error occurred and the oven was made 6.0cm longer than specified in part (a). In this case, what would have to be the frequency of the microwaves for there still to be five antinodal planes of the electric field along the width of the oven?

Review. A microwave oven is powered by a magnetron, an electronic device that generates electromagnetic waves of frequency 2.45 GHz. The microwaves enter the oven and arc reflected by the walls. The standing wave pattern is produced in the oven can cook food unevenly, with hot spots in the food at antinodes and cool spots and nodes, so a turntable is often used to rotate the food and distribute the energy. If a microwave oven intended for use with a turntable is instead used with a cooking dish in a fixed position, the antinodes can appear as burn marks on foods such as carrot strips or cheese. The separation distance between the burns is measured to be %. From these data, calculate the speed of the microwaves. 

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