#electromagneticwaves

[picnotesknowledge]

Researchers of the Academy establish a connection between quantum correlations and spacetime geometry by exploring the consequences of locality for measurements distributed in spacetime: http://bit.ly/Quantum_Spacetime_Geometry

Image credit: Credit: Quantum Information/Harald Ritsch/ÖAW

[fukuiyusuke]

Circle-incidens imaginem, 2019-76. japanese ink on paper. 62 x 48 cm, 2019. #fukuiyusuke #contemporaryart #福井祐介 #墨 #sumi #japaneseabstract #abstract #抽象 #現代美術 #円相 #電磁場 #電磁波 #electromagneticfield #electromagneticwaves #2019 #japanesecontemporaryart #紙 #paper #postminimalism https://www.instagram.com/p/Bt_CGUMAkkb/?utm_source=ig_tumblr_share&igshid=po9r335m80im

[fukuiyusuke]

Circle-incidens imaginem, 2019-39. japanese ink on paper. 62 x 48 cm, 2019. #fukuiyusuke #contemporaryart #福井祐介 #墨 #sumi #japaneseabstract #abstract #抽象 #現代美術 #円相 #電磁場 #電磁波 #electromagneticfield #electromagneticwaves #2019 https://www.instagram.com/p/BtyDqj7gzCQ/?utm_source=ig_tumblr_share&igshid=mu5ud8wf7mkg

[fukuiyusuke]

Circle-incidens imaginem, 2019-62. japanese ink on paper. 62 x 48 cm, 2019. #fukuiyusuke #contemporaryart #福井祐介 #墨 #sumi #japaneseabstract #abstract #抽象 #現代美術 #円相 #電磁場 #電磁波 #electromagneticfield #electromagneticwaves #2019 #japanesecontemporaryart #紙 #paper #postminimalism https://www.instagram.com/p/BuVpmmWgk9n/?utm_source=ig_tumblr_share&igshid=zpm9kde7163t

[lichtdotproduct]

9702 - electromagnetic waves

mhmhmhmhmhmhmhmhm yummy radiation and burns

TWO posts IN one DAY? now thats a whole treat, isnt it guys!

i wanted to talk about electromagnetic waves, because mainly i can't remember all of their frequencies and wavelengths because i'm pretty sure you need to memorise them for the exam...

but the real question, what are electromagnetic waves?

electromagnetic waves are a type of transverse waves that are progressive, meaning they can transport energy without matter.

they can be diffracted, reflected, polarised (important part, only transverse waves can be polarised), refracted, and produce interference patterns.

these guys have a neat thing: they are able to travel through a vacuum (space!). and in a vacuum, they all travel at the speed of light! (3x10^8 ms). that's something you gotta remember.

unfortunately yeah you DO have to remember all of them, so here's my best attempt at remembering all of them:

radio waves (R), wavelength of 100Mm to 1m

microwave (M), wavelength of 1m to 1mm

infrared (I), wavelength of 1mm to 750nm

visible light (V), wavelength of 400nm to 700nm

UV light (UV), wavelength of 400nm to 1nm

X-ray (X), wavelength of 1nm to 1pm

Gamma Rays (G), wavelength of 1pm to 1x10^-4 pm

some things to note:

the higher the frequency, the higher the radiation

once you go above visible light, those type of electromagnetic waves are highly ionising, and potentially dangerous. (UV, X-ray, Gamma)

high energy EMs:

dangerous to humans

are highly ionising, meaning they can cause illness and cancer in living issue if exposed to for long enough

low energy EMs:

good for communication

less harmful to humans

can span across wide areas (radio)

quite a short chapter, but still important nonetheless! remebering all of the wavelengths have really got me stumped though...

thank you for reading! all the best to your studies :)

[whatsissue]

China Unveils Cutting-Edge Stealth Coating That Redefines Anti-Stealth Radar Evasion

China Unveils Cutting-Edge Stealth Coating That Redefines Anti-Stealth Radar Evasion In a significant advancement in military technology, the Chinese military has announced the development of a groundbreaking radar-defeating coating designed to conceal targets from anti-stealth radars. This innovative coating, which is paper-thin yet highly effective, can absorb low-frequency electromagnetic waves (EM), marking a remarkable leap in stealth technology. Transforming Stealth Aircraft Detection This breakthrough has the potential to revolutionize how stealth aircraft evade radar detection, particularly against EM waves emitted from various angles. Historically, radar-absorbing materials have had limited success in countering radar systems, a costly lesson highlighted by the detection and subsequent downing of an F-117A "Nighthawk" during the late 1990s in Yugoslavia. Developed by researchers at China's National University of Defence Technology (NUDT), this new material can absorb wavelengths ranging from 70 to 20 cm, which are primarily used by anti-stealth P-band and L-band radars. These frequency bands are critical in detecting stealth aircraft, making this coating a vital development for military applications. Unique Properties of the Coating What distinguishes this stealth coating is its lightweight and flexible nature, allowing for large-scale production that is economically viable for military use. Composed of metamaterials, the coating exhibits extraordinary properties not found in natural materials. When low-frequency EM waves strike the surface, these metamaterials convert the incoming energy into heat, dissipating it quickly and thereby significantly reducing the radar signature. Strategic Implications Chinese researchers have indicated that this development is crucial for enhancing future warfare strategies, potentially providing the country with a competitive edge on the global stage. As advancements continue in stealth technology through innovative materials like this, the balance of military capabilities worldwide may begin to shift. The Ongoing Technological Arms Race With China's persistent advancements in anti-stealth technology, this new coating represents more than just a military upgrade; it signifies a strategic shift in defense capabilities. It underscores the growing importance of metamaterials in modern military applications and reflects the ongoing technological arms race among global powers. Conclusion This latest innovation in stealth technology could have profound implications for global military dynamics, setting a new standard for what stealth technology can achieve in contemporary warfare. As nations race to enhance their defense systems, China's development of this advanced stealth coating may redefine the future of aerial combat and radar evasion. Read the full article

[mikehaysbooks]

Can you guess what I found while rearranging my closet shelves today? It’s also known as the gadget I spent several hours playing with (wasting time?) today. #ScienceRocks #ElectromagneticWaves https://www.instagram.com/p/Cmp1iLoOxHy/?igshid=NGJjMDIxMWI=

[hssliveguru1]