A typical cell phone, which transmits microwaves, can have an output power as hi
ID: 1695412 • Letter: A
Question
A typical cell phone, which transmits microwaves, can have an output power as high as 2.0 W.(a) Approximating the cell phone as a point source that radiates evenly in all directions, calculate the radiation intensity of a cell phone at a distance of 2.00 in. which is the approximate distance from your cell phone to your brain. Convert inches to whatever metric units you need, and give your answer in milliwatts/cm2.
(b) The U.S. Food and Drug Administration limits the radiation leakage of microwave ovens to no more than 5.0 mW/cm2 at a distance of 2.00 in. How does your answer above compare with the maximum allowable power density leaking from a microwave oven? (Answer as the ratio of cellphone power / microwave power.)
(a) Approximating the cell phone as a point source that radiates evenly in all directions, calculate the radiation intensity of a cell phone at a distance of 2.00 in. which is the approximate distance from your cell phone to your brain. Convert inches to whatever metric units you need, and give your answer in milliwatts/cm2.
(b) The U.S. Food and Drug Administration limits the radiation leakage of microwave ovens to no more than 5.0 mW/cm2 at a distance of 2.00 in. How does your answer above compare with the maximum allowable power density leaking from a microwave oven? (Answer as the ratio of cellphone power / microwave power.)