Don’t Die Of Ignorance From LED’s & Your Smart Devices

Written by John O’Sullivan


Our recent warning over 5G, LED and electromagnetism dangers is causing a real stir! Joining us again on our weekly TNT Radio show (March 12, 2022) was Dr Nisa Khan, an eminent international expert in this field of engineering to share the facts the mainstream media won’t report.

Holder of 10 US scientific patents, a senior member of the Institute of Electrical and Electronics Engineers (IEEE) and appearing in Who’s Who listed as a world authority in this field, Dr Khan has been sounding a warning for several years over the wholesale commercial applications of electromagnetic radiation in our smart phones, Internet of Things (IOT), Wi-Fi, LED lights and related systems.

Like us at Principia Scientific International (PSI), Dr Khan understands that it is NOT ‘the virus’ or ‘Russian tyrants’ that are the real threats to our wellbeing. As a world-leading authority on LED lighting technology, she has the intellectual rigor to see beyond the media smoke screen and perceives a far more insidious evil.

In her previous interview Dr Khan drew stark comparisons between the tobacco industry’s promotion of heavy smoking. As with cigarette addiction of previous generations, so with our modern smart phone cravings –  the slow, insidious and very real cancer impacts are long term and mostly invisible.

A total lack of regulatory remedial action or any media concern about this growing and often invisible threat to our health has prompted Dr Khan to team up with PSI to help spread the truth among our 12 million monthly followers.

So well received was Dr Khan’s appearance on our TNT Radio’s weekly broadcast March 16, 2022, that we urged her to return for a follow up discussion. The podcast is available to listen to for free at

Dr Khan’s insight, as a pioneer in understanding the nature and practicalities of electromagnetic radiation is second to none. Despite a rewarding career in the field of LED she issues a stark warning of its growing dangers. Speaking to Texan Engineer, Joe Olson, Canadian space scientist, Joe Postma and your truly, Dr Khan warned:

“So, when there is so much evidence against RF radiation and has been for a century, what could be the purpose now for increasing electromagnetic radiation everywhere?”

Her conscience pricked by the ramifications of the impending and unvetted mass 5G rollout, Dr Khan feels a strong moral compunction to blow the whistle on a risk to human health so great it puts the threat of COVID and Putin in the shade.

I asked this eminent expert; can it really be that bad?

“Yes, governments and Big Tech are completely ignoring the health risks of near field radiation pattern and intensity in space. The safety protocols are useless because they rely on what we call a far-field approximation, as if we are using our cell phones not in our house but in the neighbors backyard!” lamented Dr Khan.

Globally, scientific, technical, and standard communities are all behind adopting 5G and massive connectivity, but all the while we are supposed to save energy and resources?

“There is a good deal of evidence that intense EMR/EMF [electro-magnetic radiation] causes flu and dizziness for many people and yet FCC, IEEE, and ICNIRP are increasing the limit for RF [radio frequency] exposure; still their limits are based on erroneous science around RF beams that are generated from cell phone and base station antennas.”

In our interview Dr Khan referred to another RF expert, a former employee of Hewlett Packard that helped make and evaluate most of the very high-frequency RF measurement equipment from years back and who thought that cell phone RF radiation for 1G or 2G phones were already too much.

source of image:

“He thought that even back then, 20 years ago, so dangerous was the risk from cell phones that he would not have one near his head or left in his pockets. He understood that such radiation could give him brain cancer and or make him infertile – so, what could today’s 4G and 5G radiation do to us?”

That was back in 2001 when Dr Khan worked with venture-backed high-end optical and RF transceivers. To emphasise her point about this insidious, mostly invisible danger, Dr Khan used an example everyone can readily see: LED car headlights and laser pointer pens. Laser pointer pens carry danger/hazard signs – but not many LED lights do. Dr Khan went on to make several points:

“Laser pointer pens have radiation power on the order of a few milliwatts – the same as the tiny lasers. I used my PhD thesis work around making optical devices such as very small waveguides and high-speed waveguide devices.  There are essential warning labels on devices about these commercial lasers that clearly tell users to not look into them or shoot them into others’ eyes! I always follow these instructions very carefully –  I understand the risks. Most untrained people do not.”

But now, every day, virtually all of us look at LED headlights from one car after another for seconds and sometimes minutes every day!

We asked Dr Khan, what are the optical radiation powers from these headlights that we encounter? She replied:

“These are at least 1000 Watts that come directly to our eyes when we are within certain angular or directivity zone in which the LED headlights emit most of their light!  That is an increase of optical radiation power of 1,000,000-fold or 6 orders of magnitude!”

Dr Khan made the point that she would rather have these little laser pointer pens directed to her eyes over these LED headlights any day. To reinforce the point, she asked prominent optical scientists about her concerns, and they agreed with her.

In measured yet impassioned tone, Dr Khan added:

“Consider commercial LED flashlights – they carry a warning sign to not look into the beam from the flashlight because it is enormously intense.  These LED flashlights produce far less total radiation wattage as well as radiation density or intensity measured in Watt per meter squared compared to most LED headlights in today’s cars.  Again, orders of magnitude less and not a single LED headlight has any warning signs on them, and people are forced to look at these lights every day because regulators allowed them to be installed in all cars!”

As we are beginning to see from the way ‘vaccines’ were rushed out during the pandemic, profit too often is put above safety. Some of identified biological effects and their associated health patterns from regular exposure to such radiation includes heat damage, oxidative stress, DNA damage, fertility problems, sleep disorder, VGCC Activation, Leukemia and other cancers [1]

Dr. Khan explained how her conscience drew her more towards addressing safety. She explained to TNT radio listeners about how LED-based lamps would more appropriately and safely be manufactured if her patents were applied.

“Without applying the requirements set out in such patents, LEDs will remain directional and will never produce the beautiful glow that incandescent lamps generate.”

Asked why this isn’t being done by her or others, she clarified that only she can design the necessary waveguides for appropriate light diffusion from LED chips; and that such a design might end up costing a great deal while using up material resources like semiconductors and others that are already becoming overused and have become rare.

But she added that the most important thing she could offer to the wireless and LED lighting industries is education, education, and education.  The lack of proper education and training has led to inaccurate measurements and claims that are confusing and harming people today.

While not many people are instantly dying or getting sick from these gadgets, slow deaths and debilitation are sure to follow because such intense radiation from these gadgets accumulate in our bodies over time, breaking down cellular fidelities that we rely on for living.

But there was room for some levity in our broadcast. Dr. Khan shared a funny story around the LASER acronym in the show.  Related to this story is what she told John in their personal conversations on her fond memories of working with Professor Robert J. Collins, who challenged her to find the answer to why a laser produces a pencil beam in 1987 when she was her graduate student in electrical engineering.

In 1960, Professor Collins along with his co-workers at Bell Labs made the first laser that produced a pencil beam and yet Theodore Maiman received the credit for building the first laser.

This credit is valid if laser is literally what the acronym says, namely Light Amplification Stimulated Emission Radiation because Maiman indeed built the first optical amplifier in a solid-state material, namely ruby.  However, even back then and today, laser is meant to be differentiated from an optical amplifier in that the device must pass a threshold to achieve optical oscillation known as ‘relaxation oscillation’ at which point a pencil beam starts to form.

Dr Khan continued:

“Arthur Schawlow, who along with Charles Townes, established the maser-laser theory, jokingly made a comment at a conference that LASER should really be called a LOSER because it was far more relevant for such a device to achieve oscillation and not just amplification.  Nowadays, everyone knows that a laser is really a LOSER but not necessarily a loser!”

Before the show’s end, Dr. Khan expressed how humbled she was by finally being able to discern why a laser produces a pencil beam. No other scientist had ever accurately fathomed this out.

“Professor Collins is the only person I know who wasn’t satisfied with the erroneous answers many notable optical scientists provided for decades and he was right to not fall for the guesses that were inconsistent!”

It had taken more than 20 years, but she had the answer to the question originally put to her by her university mentor, Professor Collins [ web link for Professor R. J. Collins’ paper on Bell Labs and the ruby laser:].


About Dr M. Nisa Khan

M. Nisa Khan is the author of, “Understanding LED Illumination” (CRC Press, 2013) – a widely used university textbook around the world in the field of laser and LED engineering and solid-state lighting. She received the B.A. in physics and mathematics from Macalester College in 1986 and the M.S. and Ph.D. degrees in electrical engineering from the University of Minnesota, Minneapolis, in 1988 and 1992 respectively. During her studies, she worked as a research associate for 9 years at Honeywell Solid State Research Center in Bloomington, Minnesota. After completing her doctorate, she became a member of the technical staff at AT&T Bell Laboratories (now Nokia Bell Labs) in Holmdel, New Jersey, and spent most of her 6 years at the Photonics Research Laboratory at Bell Labs-Crawford Hill conducting pioneering work on 40-Gb/s optoelectronic and integrated photonic devices. Dr. Khan then worked on optical communication subsystems at several other companies, including her own venture-backed companies in New Jersey. In 2006, she started an independent research and engineering company, IEM LED Lighting Technologies, and has since been involved in innovation and technology development for making solid-state lighting more suitable for general lighting. She has written over 40 peer-reviewed research articles in IEEE, OSA, and AIP journals, presented numerous invited and contributed papers at OSA, IEEE, and APS conferences, notable international conferences in Europe and China, and has 10 U.S. granted patents as either first or sole author. Dr. Khan performed many feasibility field studies for LED display and signage industries and wrote over 50 LED column articles from 2007 to 2016 in Signs of the Times magazine, which has been serving the electric sign illumination industry since 1906. Dr. Khan’s original scientific contributions can be found in that highlight her discovery of why semiconductor lasers, LEDs, and RF antennas produce directional beams and she is the first to derive the closed-form, analytic equation for near-field electromagnetic radiation distribution from finite, flat radiation sources. This derivation along with the theory of Fourier Optics prove that LEDs, lasers, and flat RF antennas and their arrays are NOT point radiation sources no matter how far the observer is from a flat radiation source. This discovery is very notable and she explains with her new theory why high- power and high-brightness LED-based lamps – used for example as car headlamps – have tremendous glare that propagate directly into viewers’ eyes when their field of view substantially overlaps with the center optical axes of the headlight beams. Her discoveries have been validated by experiments and finite simulations many times over and stand as the only work that can help the auto headlamp industry upgrade their photometric standards for non-point sources that produce non-uniform luminance and radiance – and adopt appropriate measurement techniques that would disqualify all current LED headlamps for having too great a luminous intensity along the optical axes of both high and low beams. Similarly, her work suggests that current 4G and 5G wireless signals generate dangerous levels of electromagnetic radiation for cell phone users and for residents who live nearby antenna base stations.   Source:

Dr Khan’s website address:

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