em radiation


In Hiroshima, there are permanent shadows caused by the intensity of the blast from the bomb that was dropped. Nuclear bombs emit EM(electromagnetic) radiation which was absorbed by the people or objects that were in front of the radiation. So if they were far enough away from the blast, they wouldn’t have been incinerated, but still would have cast a shadow.

Since thermal radiation is light, and since light travels from a central point, everything in its path is burned except when there is something blocking it, so it creates this shadow effect. The surfaces behind the matter (the objects you see the shadows of) received much less radiation bleaching so there is a visible difference

EM SHIELDING: WOW. this passes the sniff test

My comment, given in advance: The proper lingo is used here. I did not study this, it is just a comment that came in from a VERY credible source that appears to be completely legit:
Chris Kitze sent:

Jim, following up on the EMP issues, I’ve been working with a friend on a shielding technology to protect against everything from cell phones (3-5G), microwaves and on down to magnetic / EMP that will be laminated into a flexible PVC sheet and made into various shapes for small Faraday cages, etc. This tech can shield against destructive and spying frequencies, and it has to be tested thoroughly with expensive equipment to know it actually works. You can’t judge things with an AM radio in a trash can, that’s a joke.

The current technology we’ve been able to find basically stopped in the 1970’s, so it’s out of date for the new things coming and it hasn’t been properly tested – even the DOD is lagging on this – I think this is the reason all the carriers were back in port at the same time getting retrofitted to protect against this kind of electronic warfare. Most of the current tech (e.g. Silent Pocket) are good only for NFC, cell, microwaves and many haven’t been tested to cover the new 5G and existing products use two layers of a silver coated wire or plastic mesh, separated by an insulating layer of nylon. The aluminized mylar things on Amazon are only good for static and not much more, even in multiple layers.

The trick with the low frequencies is to use nickel or nickel alloys and they have to be properly annealed and manufactured to actually block these things and this requires a third layer of foil with special treatment, in addition to the other two layers mentioned previously. People are now even adding 2-3% Ferrite and other metal powders into concrete mixes to protect buildings! All your tinfoil hat readers are just ahead of the crowd… As you mention, EMP from a nuke is probably not a huge threat, it’s the high powered microwave plane or cruise missile flying by or even a CME from the sun that’s the biggest threat to electronics.

5G is potentially the most problematic, because it is very near to the frequency being used in the so called “terahertz” airport body scanners. Once this gets deployed, anyone with a “viewer” could see through people’s clothes, walls of houses, inside cars, etc. using the signal propagated from cell towers! Law enforcement will be able to do warrantless searches of nearly anything, inside your bags, car, home, under your clothes, etc. They can also use a more powerful NFC to trigger the chip inside your passport or ID to know exactly who is inside a house or card BEFORE they even pull over a car or go inside a building. You will want to shield all the NFC/RFIC stuff, your trunk and whatever else you want protected.

Yes, it literally sounds like tin foil hat time, but it’s becoming real very fast. The long term health consequences of 5G are not known, but they could result in lots of cancers and other ailments that will only be discovered AFTER the tech is put into use. With 5G, every cell tower is now like a high powered airport scanner. When one of my tech guys explained this to me, it was pretty shocking and people will want to start paying attention.

—  freelance jimston





no time for poni poni live reax, too busy with writing a lab report on using a lock-in amplifier to experimentally verify the inverse-square law for EM radiation

then i gotta make a presentation on the interferometry experiment i did last month, referee a submission to JAUPLI, finalize a tutorial video on how to operate the sr830 lock-in amp and how to take data with it, revise my first two reports, and touch up my resume and send it in for a potential job this fall

this weekend is dedicated entirely to just one of my classes

EM Spectrum - DP

I read this post by Scrollingdown and ended up in a conversation with a friend about assumptions on alien life based on Earthly biology.  Basically it boils down to the question: If ectoplasm itself is sensitive to EM radiation, why does it have to be the eyes that see?


EM Spectrum


Two days after the accident, Danny sat in his room, door closed and locked (he’d tripled-checked).  He shivered and shook and closed his eyes, running his hands through his hair, mentally trying to psyche himself up for what he was about to do.

“I don’t want to do this,” he muttered, grabbing hold of his hair and yanking on it a few times. 

Keep reading


Strange theories about the shape of the universe.

Music by Conflux

(Void Mirror)


Light becomes polarized because of its wave nature.

As electromagnetic radiation (in the visible spectrum), a light wave is composed of both electric and magnetic field components, and is usually represented by a phase vector that encodes information about just the electric field. The phase vector points in the direction of the electric field, and its magnitude denotes the electric field strength. Because the phase vector can be decomposed into orthogonal components that oscillate sinusoidally, light is called a wave, and the phase of the wave at a certain place and time refers to its place along the sine curve.

Examine a planar wave, which travels along the z axis with electric and magnetic fields in the x-y plane. Let E(t,z) be the phase vector with orthogonal components x(t,z) and y(t,z) that are time- and space-dependent. If the x and y field components oscillate with amplitudes Ex and Ey, then

Ex2 + Ey2 = ||E||2 for all t, z
x(z,t) = Excos(kz-ωt1)
y(z,t) = Eycos(kz-ωt2)

where the following are constants:

ω  is the frequency, in units of Hertz (Hz) or radians/second,
k  is the (angular) wavenumber, in units of radians/meter, and
φ1, φ2 are the phases, in units of radians.

Polarization is the phenomenon of light waves having the same spatial orientation of their phase vectors (if it happens in nature), or the restriction of the phase vectors to certain orientations (by experiment). Ordinary sunlight is generally unpolarized because the direction of the individual phase vectors are aligned randomly with each other as they oscillate. By passing unpolarized light through a linear polarizing filter, waves result whose phase vectors only oscillate along a particular axis, say the horizontal (x) axis. One has “filtered out” the vertical (y) electric field components from every wave that passed through the linear polarizer. Thus Ex = E is the amplitude for the whole wave, and

x(t,z) = E cos(kz-ωt)
y(t,z) = 0

If you projected the endpoint of the phase vector onto a cross-section of the travelling wave (a picture called a Lissajous curve), you would see a line - hence the name, linear polarization.

Other polarizations are possible where the direction rather than the magnitude of the phase vector changes. If one takes the horizontally polarized light, tilts it 45 degrees to halfway between horizontal and vertical (like the animation), and then passes it through a quarter wave plate that slows down electric field along the horizontal axis by a quarter phase, one obtains circularly polarized light. The horizontal component of the phase vector now oscillates a quarter phase (2π/4 = π/2) behind the vertical components, resulting in the parametric equations

x(t,z) = (1/√2) E cos(kz-ω(t-π/2))
y(t,z) = (1/√2) E cos(kz-ωt)

which, keeping z constant, represent a circle (the 1/√2 comes from sin 45 deg and cos 45 deg). You can calculate that the phase φ1 is

φ1 = ωπ/2

If the polarizing plate inserts a different phase in the x field component, then you’ll get elliptically polarized light.

How can you tell what polarization light has, or if it’s polarized at all? Unless you have a sensory organ that detects the direction of the electric or magnetic fields around you, the only way change you can see after polarizing a light source is a reduction (usually) in the intensity of the light, which is proportional to the square of the electric field amplitude. For example, the intensity of ordinary sunlight is approximately halved when you put on Polaroid sunglasses.

What happens when you pass light through two linear polarizers? Three linear polarizers?

Requested Anonymously

Radio, television, and wifi are all forms of long-distance electromagnetic communication. They all use electromagnetic waves of various wavelengths to send signals through free space. However, these signals use electric fields and antennae to communicate. Beldum uses a magnetic field to talk to others of its kind.

Using a magnetic field to send signals is known as near-field magnetic induction communication, or NFMIC. It’s inherently different than radio or wifi signals for a few reasons, the most significant being the first letter–near. Radio and wifi waves propagate over long distances and through free space. NFMIC signals exist only within a localized magnetic field.

The first step to NFMIC is to create a magnetic field then. In long-distance signals, antennae are used to emit EM radiation that contains the message (see Dedenne). In typical NFMIC, coils are used to create a magnetic field. The energy of the field can create electromagnetic waves much like an antennae, typically with wavelength a frequency in the same range as radio, television, and wifi waves. Again, unlike other kinds of communications which go out into free space, the signal only exists inside of the magnetic field.

So that’s how beldum communicates with others of it’s kind. It connects to others via generating a magnetic field, and sends electromagnetic pulses to each other using radio waves inside of the field. 

The other part of beldum’s pokédex entry states that beldum actually doesn’t have blood, but rather a magnetic force. At first, this doesn’t seem to make sense. Blood is a physical liquid, and magnetism is a force. Substituting blood for magnetism would be like substituting a meal in exchange for a game of bowling. It’s comparing apples and oranges, but even more extreme. You can’t satisfy hunger and gain nutrients by knocking down bowling pins. You can’t transport oxygen and fight off viruses with a magnetic force.

But that doesn’t mean the pokédex is lying. Beldum is a fairly funky pokémon, almost more robot than animal. And if that’s the case, it wouldn’t need blood. Robots wouldn’t need to breathe or eat or transport nutrients, so they don’t need a bloodstream. They do, however, need wires and capacitors to move electricity to their various limbs. This is where the magnetism comes in. Moving charges (electric current) create magnetic fields, and magnetic fields can push charges along.

Actually, every animal (including humans) has electrical signals coursing through their bodies. Our nervous system is nothing but a series of electrical signals that lets us move our muscles, feel pain, and in general makes us function. Our entire brain consists of these little electronic signals firing off–that’s what makes thinking possible.

So beldum doesn’t have to be a robot at all: it simply has magnetism coursing through its nervous system, controlling its body and letting it communicate with others of its species. This whole electrical system runs its body and makes it “alive”, even if it doesn’t have blood. Lots of organisms don’t have blood: jellyfish, plants, algae, fungi, microbes and so on.

Beldum uses near-field magnetic induction communication to talk with others of its species. It’s nervous system is run by magnetic energy, and it doesn’t have blood.

So, I’m watching this TV show called Fringe (it’s a great show you should check it out!) anyway, (long story short) they basically do this science experiment that involved Electro-Magnetic fields and it makes a necklace float. 

Electro-Magnetic fields you say? Let’s apply that to Cybertronians - because why not!

Imagine it takes a massive about of self-control for a Cybertronian to keep their Electro-Magnetic fields contained and regulated. Control generally occurs naturally - but, in certain instances (emotional stress, physical arousal, anxiety…sneezes) their EM-Fields go unregulated. 

Which could lead to human/organic life getting electrocuted if they spend too long around a Cybertronian 

OR, in lighter circumstances. Huge mechs can produce massive amounts of EM radiation. Smaller mechs get ‘lighter’ around them. 

In extreme circumstances e.g during overload or sneezing. Huge mechs have made their partners or nearest minibots float.