Place these in decreasing order of Radiation Emissions.?

Question

Cellular phone, TV, radio, microwave, A/C and laptop computer. (Add any comments at the end of your answer.)

Answer 1

Cellular phone, TV, microwave, laptop computer, radio, A/C.

But I am mostly guessing. None of it is "nuclear" radiation or radioactivity. The cell phone sends out radio radiation on purpose. I know microwaves are shielded to keep the microwave radiation inside, but it probably isn't perfect. TVs that use a picture tube emit some X-rays I believe, but LCD and plasma screens don't. I cannot think of any radiation from an A/C. For the radio I assume it is a receiver only, not a 2 way radio like a cell phone is, but even a reciever can emit some leaked radio energy. And the laptop can leak some radio radiation, which is why the airlines don't want you using them in flight, because they might interfere with radio navigation and communication signals.

Answer 2

It's not possible to place them in decreasing order of radiation emissions, as those radiation emissions need to be quantified in some manner. Are you asking for decreasing order of frequency, wavelength, power, electric field intensity, magnetic field intensity, likelihood of adverse interaction with living cells, or some other parameter?

Integrating power over bandwidth, plasma TVs almost certainly top the list, being essentially vast arrays of tiny spark gap transmitters. Cellular phones, being intentional radiators, are obviously high on the list. A Fourier transform of the squarewaves used in computers yields spectral content all over the place, so a laptop computer, despite EMI/EMC efforts to comply with Part 15 of the FCC rules, will still emit a lot of non-ionizing radiation. Radios and TVs typically utilize superheterodyne architectures that require a local oscillator (LO) that inevitably leak some non-ionizing radiation outside of their enclosures. Aside from the possibility of some slight leakage of 2.45 GHz energy from a microwave oven, microwave ovens and, to a greater extent, air conditioners consume large amounts of power which can, especially if a neutral imbalance exists in the power distribution cabling, radiate large magnetic field intensities. So, without clarifying your question and taking measurements pertinent thereto, you can't know how much radiation those items emit or rank them in decreasing order. You could easily spend a quarter million dollars on EMI/EMC test equipment to find the real answer to your question, once it has been clarified.