#electromagnetic waves

[straightissacnewton]

call me 0.4 to 0.7 µm because I’m visibly on the spectrum

#saturn speaks #autism #autizzy #actually autistic #electromagnetic waves #visible light #science memes #em waves #shitpost #astronomy #science

[noosphe-re]

Visualizing dipole radiation, Raimund V Girwidz 2016 Eur. J. Phys. 37 065206

#physics #electricity #electric field #science #electromagnetic waves #electromagnetism

[relativelymargo2511]

Did you know?

the colour of a star actually depends on its temperature, due to something known as black body radiation. a perfect 'black body' absorbs all radiation and is the best emitter.

hotter objects emit electromagnetic waves with shorter wavelengths, and slightly colder objects emit longer wavelengths (which could be seen as a bit counterintuitive).

so, blue stars are hotter than red stars.

#black holes #black body #stephen hawking #physics #electromagnetic waves #universe #stars #astrophysics #science #physicslovers #physicslover #stem #nasa #scienceiscool #physicist #space #outerspace #astronomy

[yesterdays-xkcd]

Sometimes I try to picture what everything would look like if the whole spectrum were compressed into the visible spectrum. Also sometimes I try to picture your sister naked.

Electromagnetic Spectrum [Explained]

Transcript

The Electromagnetic Spectrum These waves travel through the electromagnetic field. They were formerly carried by the aether, which was decommissioned in 1897 due to budget cuts. Other waves:

Slinky waves [Cueball and Megan hold the ends of a tangled slinky.]

Sound waves [There is a snippet of a frequency band. Between 20 Hz and 20 KHz is labeled "Audible Sound." Towards the top is a line labeled "That high-pitched noise in empty rooms."]

The wave [A row of people does a wave.]

[Three parallel scales are across the bottom. The first is lambda (m), ranging from 100Mm to 100fm; second is f (Hz), which starts at 1 Hz and reaches 100 THz about 2/3 of the way along, after which the labels read "other entertaining greek prefixes like peta- exa- and zappa-;" last is Q (Gal^2/Coloumb), whose labels are 17, 117, pi, 17, 42, phi, e^pi-pi, -2, 540^50, and 11^2. Above the scales and lined up accurately with the first two are the following:]

Power & Telephone (100Mm to 1km)

Radio & TV (1km to somewhere between 1m and 10cm); above that are many boxes showing subranges (AM, VHF, UHF, 24/7 NPR pledge drives, a very thin band for the space rays controlling Steve Ballmer, 99.3 "The Fox," 101.5 "The Badger," 106.3 "The Frightened Squirrel," cell phone cancer rays, CIA, ham radio, kosher radio, shouting car dealership commercials.)

Microwaves (a bit more than 10cm to a bit more than 1mm); it also has subranges (aliens, just below SETI, wifi, FHF, brain waves, sulawesi, gravity)

Toasters (about 1mm to about 100 micrometers)

IR (about 100 micrometers to somewhere between 1 micrometer and 1 nm); above that is a bell graph labeled "Superman"s heat vision," with a motorcycle driving up the left side labeled "Jack Black's Heat Vision."

Visible light (and, under it, visible dark); above that is a bell graph labeled "sunlight." There's a breakout chart above it showing the visible spectrum from 700nm (red) to 450nm (violet). There's an arrow pointing to where octarine would be, somewhere off to the side. Above that are bars showing the absorption spectra for hydrogen, helium, Depends(R) (yellow only), and Tampax(R) (red only).

UV (about 100nm to about 10nm)

Miller Light (a thin bar around 10nm)

An unlabeled section with a thin line above it showing the frequency of the main death star laser

A blocked-off portion labeled "Censored Under Patriot Act."

X-rays (from about 1nm to about 10pm); a line above shows the frequency of mail-order x-ray glasses. Somewhere vaguely above the 10pm mark is a potato.

Gamma/cosmic rays (10pm and smaller); above that is a bar marked Sinister Google Projects that also trails off into higher frequencies, and blogorays, which are slightly lower.

#xkcd #xkcd 273 #electromagnetic waves #2000s #2007

[thepastisalreadywritten]

Physics can help us understand how the ancient Egyptians built the great pyramids of Giza, as well as how they interact with electromagnetic waves.

One of them is the wet sand technique.

This technique involves wetting the sand to reduce the friction and the effort required to drag heavy blocks of stone on sleds.

A team of physicists from the University of Amsterdam demonstrated this technique in 2014, using a simple experiment and numerical simulations.

They showed that wetting the sand to just the right degree can reduce the required pulling force by up to 50%.

This technique may have been used by the ancient Egyptians to transport the blocks from the Nile port to the pyramid site.

Another aspect of physics that can reveal some mysteries of the pyramids is the electromagnetic response.

This refers to how the pyramids interact with radio waves of different frequencies and wavelengths.

An international research group applied methods of theoretical physics to investigate this phenomenon in 2018.

They used numerical modeling and analytical methods to calculate the electromagnetic field distribution inside and around the Great Pyramid of Giza.

They found that under resonance conditions, meaning when the wavelength of the radio waves matches the size of the pyramid, the pyramid can concentrate electromagnetic energy in its internal chambers and under its base.

This effect may have some applications for designing nanoparticles that can manipulate light at the nanoscale.

#Ancient Egypt #pyramids #wet sand technique #University of Amsterdam #Ancient Egyptians #theoretical physics #electromagnetic field #Great Pyramids of Giza #electromagnetic waves #Nile

[wikipediagrams]

#gif #electromagnetism #electromagnetic waves #diagram #animation #wave #wave function #function #credit:Lookang #graph #3d #physics

[dreaminginthedeepsouth]

Saint Malo :: France

* * * *

People walk the paths of the gardens below, and the wind sings anthems in the hedges, and the big old cedars at the entrance to the maze creak. Marie-Laure imagines the electromagnetic waves traveling into and out of Michel’s machine, bending around them, just as Etienne used to describe, except now a thousand times more crisscross the air than when he lived—maybe a million times more.

Torrents of text conversations, tides of cell conversations, of television programs, of e-mail, vast networks of fiber and wire interlaced above and beneath the city, passing through buildings, arcing between transmitters in Metro tunnels, between antennas atop buildings, from lampposts with cellular transmitters in them, commercials for Carrefour and Evian and prebaked toaster pastries flashing into space and back to earth again, I’m going to be late and Maybe we should get reservations? and Pick up avocados and What did he say? and ten thousand I miss yous, fifty thousand I love yous, hate mail and appointment reminders and market updates, jewelry ads, coffee ads, furniture ads flying invisibly over the warrens of Paris, over the battlefields and tombs, over the Ardennes, over the Rhine, over Belgium and Denmark, over the scarred and ever-shifting landscapes we call nations.

And is it so hard to believe that souls might also travel those paths? That her father and Etienne and Madame Manec and the German boy named Werner Pfennig might harry the sky in flocks, like egrets, like terns, like starlings? That great shuttles of souls might fly about, faded but audible if you listen closely enough? They flow above the chimneys, ride the sidewalks, slip through your jacket and shirt and breastbone and lungs, and pass out through the other side, the air a library and the record of every life lived, every sentence spoken, every word transmitted still reverberating within it. Every hour, she thinks, someone for whom the war was memory falls out of the world. We rise again in the grass. In the flowers. In songs.

[All the Light We Cannot See]

by Anthony Doerr

#quotes #Anthony Doerr #words and writing #electromagnetic waves #All The Light We Cannot See

[unwelcome-ozian]

Among the next generation of weapons is one that may involve a different sort of radiation than that emitted by atomic fission: microwaves. Electromagnetic waves may be used to disrupt an enemy soldier’s central nervous system, to cause epileptic seizures.” Anyone who doubts that the U.S. military may be considering such research need only consult a 2006 Navy directive that includes guidelines for waiving consent and suggests the potential for research involving “severe or unusual intrusion, either physical or psychological, on human subjects (such as consciousness-altering drugs or mind-control techniques).” Jonathan Moreno, a biomedical expert and author of Undue Risk: Secret State Experiments on Humans.

#document dump #Electromagnetic waves

[dkl9]

if someone asks "are you on the spectrum?" your answer is "what spectrum? the electromagnetic one?"

#autism spectrum disorder #electromagnetism #science puns #neurodivergent #electromagnetic waves

[quietimtryingtostudy]

EM Waves in increasing order of frequency:

(source)

~~~

Radio Waves: Lowest frequency waves. Used to carry signals in communication industry.

Microwaves: Capable of penetrating obstacles and objects. Due to penetrating nature, they carry radar, computer data transmission etc.

Infrared Waves: IR waves of high wavelength - producing heat. IR waves of low wavelength - imaging technologies, remote controls. capturing pictures during fog, smoke etc.

Visible Light: Emitted by natural/artificial sources visible to the naked eye. (Objects are visible when they absorb light of specific wavelength and emit light of another wavelength)

Ultraviolet Waves: High frequency, low wavelength, used in studying molecular structures and help astronomers. Carcinogenic.

X-Rays: High energy waves (High frequency, low wavelength). View bone structures in the human body, X-ray therapy. Carcinogenic.

Gamma Rays: Used for medical purposes, cancer therapy. Also carcinogenic.

(source)

Table linked - here. Check it out.

#physics #electromagnetic waves #em waves #pcm #pcb #jee #neet #cbse #cbse 2023 #electromagnetic spectrum #stem #engineering #engineering prep

[ruinconstellation]

Sound is not a physical thing. Sound is a condition of other things, a description of the way they move. A movement used to transport information, a movement that can be transferred between objects. Tuned properly, sound can move through barriers, or break them. It can take information within itself and carry it from one location to another, unwalled and unchained, because it is not a matter, it does not compete with objects for existence. It works with them, through them.

Derin Edala, Curse Words (4.113)

#curse words: spellcasting for fun and prophet #quotes #currently reading #physics #queue #magical theory #electromagnetic waves #derin edala

[rosielindy]

I am revisiting these two books I discovered in the early aughts, this is when I really became fascinated with the electromagnetic spectrum as part of my earth literacy studies.

#paramagnetism #electromagnetic waves #electromagnetic field

[ksanjeevjsr]

Lecture tutorials on Electromagnetic Waves in Physics. #CompeteWell

CompeteWell.org

#science #physics #electromagnetic waves #physics notes #ap physics

[ammodomio]

Apply defense to your smartphone to protect yourself from the harmful effects of electromagnetic waves

#defense #electromagnetic #electromagnetic waves #cancer #diseases #harmful effects #smartphones #waves

[immaculatasknight]

Electric pandemonium

#electromagnetic waves #mood alteration #behavior modification #microwave weapons #military #crowd control #zombification #induced violence #genocide

[9th-empress-suravi]

👾 A Strange energy waves felt through head. Today, 22/04/2024, afternoon I felt a strange wave flow through my body and head suddenly. I can feel that the wave coming from North direction to South direction on Earth. At first I thought it's an earthquake but actually there is no earthquake in my area. The what is the wave I felt?〰️

⭐Anyone else had this experience????

Please write on comment section......

#science #spirituality #energy #technology #tumblr milestone #nature #astronomy #astronomical object #solar eclipse #spaceship #sun #solar flares #22/04/2024 #time #time lapse #time warp #time waves #Earth #earth quake #earth energy #electromagnetic #electromagnetic radiation #electromagnetic waves #questions