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The Faraday Cage and EMF Safety: What You Might Not Know

The Faraday Cage and EMF Safety: What You Might Not Know

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Faraday cages are everywhere. There’s a good chance you use them regularly. You probably even own one. So what exactly is a Faraday cage, why are they so significant, and what’s the relationship between a Faraday cage and EMF safety? 

With September 22 marking EMF Radiation Safety Day, we wanted to answer these questions. Because there’s a lot we can learn from Michael Faraday and how his groundbreaking invention can help to keep us safe in our everyday lives.

September 22: EMF Radiation Safety Day

First, you may be wondering what EMF Radiation Safety Day is all about. 

The reality is that we’re now being exposed to more electromagnetic fields (EMF) than ever before. Electromagnetic radiation emanates from our cell phones, smart meters, laptops, even our power outlets. 

With the rollout of 5G networks around the world, that exposure is set to increase exponentially once more. 

These exposure levels are a concern. Why? Because there’s an already large and ever-growing body of research showing that EMF is harmful to human health. 

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That’s why there’s strong opposition to 5G. That’s why more needs to be done to test and regulate new technologies. 

That’s why we need to raise awareness about EMF safety. 

EMF Radiation Safety Day will take place on September 22 because English scientist Michael Faraday was born on that day in 1791. 

And Faraday not only invented electromagnetic induction, he also invented the technology that would make shielding against electromagnetic radiation possible: The Faraday cage.

What Is A Faraday Cage?

A Faraday cage, also known as a Faraday shield, is an enclosure that blocks electric fields. The cage must be made from a material that conducts electricity – for example, a fine metal mesh.

It works like this: When an electric charge or wave of electromagnetic radiation hits the cage, it gets distributed around the cage’s exterior. This cancels out electric charges or radiation in the cage’s interior, thus protecting whatever is inside. 

Another simplified way to describe the Faraday cage is as a type of hollow conductor. When the conductor is charged, the charge stays only on the surface. 

Faraday cages don’t block everything. The earth’s magnetic field, for example, penetrates. Some radio frequency waves might pass through the cage depending on factors like distance and frequency of the signal. 

Still, the Faraday cage is an incredibly powerful tool that has many applications in modern life — some that people are hardly even aware of. 

Faraday Cages In Your Everyday Life

If you’ve ever flown in an airplane or used a microwave oven, you’ve interacted with a Faraday cage. 

Faraday cages have many important yet often uncelebrated applications in our everyday lives. Let’s take a closer look at a few of them:


What would happen if you were flying in a plane and it suddenly got struck by lightening? You might not know it, but this happens regularly. The reason you don’t fall from the sky in a fiery ball is that the plane is essentially a Faraday cage. The lightening charge runs around the outside of the vessel and you’re left to watch your movie in peace. 

MRI Scanning Rooms

External radio frequency signals can cloud the data collected by MRI machines. That’s why these important medical devices are housed inside Faraday cage-like rooms.

Microwave Ovens

You know that mesh on the inside of your microwave door? You guessed it: Faraday cage. In this case, the cage works in reverse, so the microwave radiation only cooks what’s on the inside of the oven. 

Military Uses

Room-sized Faraday cages can be used when sensitive information needs to be shared, because eavesdropping devices can’t penetrate. The military also uses them to protect electronics from disruptive electromagnetic pulses (EMPs).

Protective Suits

When might you need a heavy-duty metal-lined protective suit? Not very often, but most certainly when you’re a lineman working on high-voltage power lines. 

Personal EMF Protection

The Faraday cage is also the basis of all SYB’s personal EMF-shielding products. Technology has advanced to allow conductive materials to be super fine and lightweight. We’ve designed ways to interweave these materials into everyday fabrics so you can be protected from harmful EMF rays from cell phones and other sources — even as you go about your daily life. 

The metallic fibers in our Baby Blanket, for example, are thinner than a human hair. And our SYB Phone Pouch is like a cell phone Faraday cage, deflecting 99.9% of wireless radiation away from your body.

That’s what we mean when we talk about EMF protection products. The technology created almost two centuries ago by Michael Faraday has allowed for these types of solutions to exist, even as our exposure to EMF increases. 

Why The Faraday Cage Is More Relevant Now Than Ever 

Using EMF protection to deflect harmful radio frequency waves is not a perfect solution. That’s why we always say that the best thing you can do is follow two rules: minimize your use of EMF-emitting devices and maximize your distance from them when you do have to use them. 

To put it another way, the best EMF protection is free

But in a technology-driven world, following these rules isn’t always possible. That’s a simple reality. We carry smartphones with us. We have wifi routers in our houses. We’re given smart meters against our wishes. 

And 5G mini cell receptors are going to be making EMF ever more present. 

It’s because of these reasons that EMF safety awareness is more important now than ever. 

When we look at the problems faced by Michael Faraday in the 19th century, they’re not so different to ours today. Scientific paradigms are stubborn. Faraday worked for years on end to change accepted beliefs around the interactions between electricity, magnetism, and light. 

Despite ample research, beliefs around the safety of electromagnetic fields are similarly conflicted, deep-rooted, and rigid. 

This time our health is at stake. In celebration of Faraday and his revolutionary invention, let’s do what we can to raise awareness of EMF safety this September 22.

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About the Author

Have a Question?

I take pride in designing great, effective products, based on real, measurable science – AND taking the time to ensure that each and every one of you has the information you need to understand EMF and make informed decisions.

So if you have a question, just email me and ask.


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