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The Invisible World Beyond Our Sight and Hearing

Is there a hidden multiverse just waiting for us to discover?

“The human eye can only see between 430–770 THz. Our ears can only detect sound between 20Hz — and 20 kHz. These ranges make up a fraction of the total sound & light frequency range. This means a lot is going on around us that we cannot see or hear.”

~ Unknown

There is an invisible world that we cannot see or hear. This unseen realm is filled with mystery and wonder, and there are still many secrets waiting to be discovered.

In this blog post, I will explore some of the things that may exist in the invisible world beyond our sight and hearing. So come along on a journey into the unknown!

The human eye can only see between 430–770 THz

Your eyes are only sensitive to a narrow range of wavelengths of visible light. Anything outside that is invisible to us.

Electromagnetic waves have a vast range of frequencies. This continuous range of wavelengths is known as the electromagnetic spectrum. The entire range of light is often divided into specific regions. The subdivision of the whole spectrum into different areas is done mainly based on how they interact with matter.

The diagram below shows the electromagnetic spectrum and its different regions. The longer wavelengths, lower frequencies, are located on the far-left side of the spectrum, and the short wavelengths, higher frequencies, are on the far-right side of the spectrum.

invisible world
Image Source: Plugin 2 Nature “What are Electromagnetic Radiation (EMR) and Electromagnetic Frequency (EMF)?” Website:

There are two very narrow regions within the electromagnetic spectrum: the visible light region and X-rays. You’re probably familiar with some of the different parts of the electromagnetic spectrum.

The part of the electromagnetic spectrum that humans can see depends not on how well our brains can process the information but on which wavelengths of light our retinas are sensitive to. That, in turn, depends on which molecules absorb light in these cells.

For example, you cannot see the infrared light emitted from your TV remote. But your smartphone camera can, to a limited extent. Put your phone in front of your TV and turn on the camera app. You should be able to see the screen light up.

For instance, animals like dogs have greater or different ranges of sight, hearing, and smell than humans. This is why only dogs can hear dog whistles. Why does a dog sometimes randomly start barking when no one is physically there?

Could there be something we cannot see or hear in the vicinity?

How our eyes see

Each wavelength within the NUV spectrum above represents a different color. When a particular wavelength of light strikes the retina of our eyes, we see that color sensation.

Your eyes contain two types of cells: rods and cones. But these cells don’t see. Inside the rods and cone cells are proteins that are adapted for detecting light and converting it into an electrical signal. These proteins are called “ opsins.” Opsins that have evolved can detect light from the infrared range to the ultraviolet range, but humans don’t have them.

Could humans see in ultraviolet light? Probably. A genetic mutation could occur to see into ultraviolet light. And there is an infrequent mutation that allows some people to perceive a third color, which improves their ability to distinguish colors.

We can go further because we can build CCD cameras that see into the infrared. But these cameras are much larger than our eyes.

Could we see radio waves? Radio waves have wavelengths ranging from 1 mm to 100 km. We use similar devices like shortwave radios or microwave antennas to detect them.

What about X-rays? The x-ray wavelengths are 0.01nm-10nm. These are starting to get pretty small, and, indeed, x-ray cameras do exist.

Finally, how about gamma rays? Gamma rays are the highest energy electromagnetic radiation emitted by some radioisotopes. Currently, the technology uses a “ scintillation counter” to do “ gamma spectroscopy.” A crystal that scatters gamma rays often emits a lower energy photon than one detected by a traditional camera.

Humans only know the existence of electromagnetic radiation, from radio waves to gamma rays.

Might there be more frequencies that we are unaware of?

Our ears can only detect sound between 20Hz — and 20kHz.

Your eardrum can only resonate at specific frequencies. If you go above the bone, the bones are too heavy; if you go below the eardrum, the eardrum is not big enough to be moved by such a long wavelength sound.

Our ears can hear frequencies up to 20,000 hertz, which is more than ten times greater than the frequency of our eyes.

When a musical sound occurs in a medium such as air, it causes air particles to vibrate. When these vibrations hit the eardrums, our eardrums vibrate at the same frequency, and the signal is translated from an airborne sound into electrical signals that our brains interpret as sound.


Light can easily be translated into sound because — like sound — light is a wave. Waves have a wavelength (literally, how long is each wave), and the proportions of one wavelength to another can be preserved even when sped up or slowed down by multiplying the entire series by the same number.

This is called sonification, and it can be used to translate any data into sound. Scientists have used sonification to listen to the movements of stars, the sounds of colliding black holes, and even the activity of individual neurons.

By sonifying data, we can gain a new perspective on the invisible world around us. And who knows? Maybe we’ll find a new range of frequencies that we never knew existed one day.

Here is an explanatory video of how it works.

What might be included in the frequencies we cannot see, cannot hear, and do not know about?

An invisible world of Spirit?

God, angels, spirits, heaven, and the spirit realm may exist or manifest themselves in different energy frequencies human eyes cannot see outside the visible electromagnetic spectrum.

Could this explain the rainbow around God’s throne as described in Revelation 4:3

… “A rainbow that shone like an emerald encircled the throne.”

Seeing a rainbow in the sky is one of life’s most beautiful sights. We see the rainbow, but we don’t think about why it’s there. However, God put the rainbow into the sky for more than its beauty.

When we see the rainbow in the sky, we see only half of the rainbow in the shape of an arc. However, the rainbow around God’s throne is a complete circle. When we see the rainbow in the sky, it does not move but is stationary. However, the rainbow encircles God’s throne, according to Revelation 4:3.

Could it be that as God’s throne enters man’s visible light spectrum, it begins to transform electromagnetic frequencies into our visible light spectrum, thus creating a rainbow as light energy bends around God’s throne vehicle before it comes into view or an energy frequency humans can see?

Or how about the famous cameras that ‘Ghostbusters’ use? And visions of Biblical prophets like Isiah and Ezekiel?

Some people believe that ghosts are the spirits of people who have died. They say that ghosts can be seen and heard, and sometimes they can even interact with the living.

If we cannot see something with our eyes, does it mean it doesn’t exist?

Close encounters of the third kind?

If we ever came across aliens, would we be able to understand them?

Let’s pretend that we’re suddenly face-to-face (literally) with members of an alien race. What should we do first? We should communicate that we come in peace. But could we ever really understand each other?

The first hurdle would be language. Humans communicate in an 85–255Hz frequency range of sound and the 430–770 THz frequency range of light.

It is unlikely that aliens would have evolved in the same way we did. Nevertheless, the problem lies primarily in the technical aspects. For example, sped-up whale songs generally inaudible to humans show that it is relatively simple to map “alien” sounds into forms that humans can hear, as the video above demonstrates.

Or would we even be able to see them at all?

Alternative Realities

Or might it be possible that the is a parallel/alternate reality or even a different timeline existing right alongside the one we are currently in?

A parallel universe, also known as a parallel dimension, alternate universe, or alternate reality, is a hypothetical self-contained plane of existence co-existing with one’s own. The sum of all possible parallel universes that constitute reality is often called a “multiverse.” Wikipedia

Is it all that’s out there? Science fiction loves the concept of a parallel universe, where we might live just one of an infinite set of possible lives.

There are many examples where authors have explicitly created additional spatial dimensions and multiverses for their characters to travel to reach parallel universes. Fiction is replete with alternate realities, from Star Trek to The Lord of The Rings to the Chronicles of Narnia and The time Machine.

Scientific theories explore, and in some cases support, the possibility of universes outside, parallel to or distant from but mirror images of our own.

The Many-Worlds Interpretation is an idea in quantum mechanics that suggests the universe we experience is just one of many, each with different outcomes for events.

In String theory, there are as many as 11 dimensions.

M-theory brings these all together and adds the twelfth dimension. The full M-theory has not yet been defined, but it may be the key to understanding everything in the universe.

String theory suggests that there are other parallel universes and that they’re just out of reach.

We can’t see or hear them, but they might be right next to us.

Perhaps you have seen a glitch in the Matrix?


In conclusion, while we may not be able to see or hear everything out there, it doesn’t mean that it isn’t there. Maybe we’ll find a way to detect and even communicate with other forms of life in the invisible world beyond our sight and hearing one day.

“There are more things in heaven and earth, Horatio, than are dreamt of in your philosophy.”

Hamlet, by William Shakespeare


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