The Electromagnetic Spectrum
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- Опубликовано: 15 сен 2024
- / sciencereason ... Science@NASA: EMS (Episode 1) - An Introduction To The Electromagnetic Spectrum
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Measuring the electromagnetic spectrum
You actually know more about it than you may think! The electromagnetic (EM) spectrum is just a name that scientists give a bunch of types of radiation when they want to talk about them as a group. Radiation is energy that travels and spreads out as it goes-- visible light that comes from a lamp in your house and radio waves that come from a radio station are two types of electromagnetic radiation.
Other examples of EM radiation are microwaves, infrared and ultraviolet light, X-rays and gamma-rays. Hotter, more energetic objects and events create higher energy radiation than cool objects. Only extremely hot objects or particles moving at very high velocities can create high-energy radiation like X-rays and gamma-rays.
The different types of radiation in the EM spectrum, in order from lowest energy to highest:
Radio: Yes, this is the same kind of energy that radio stations emit into the air for your boom box to capture and turn into your favorite Mozart, Madonna, or Justin Timberlake tunes. But radio waves are also emitted by other things ... such as stars and gases in space. You may not be able to dance to what these objects emit, but you can use it to learn what they are made of.
Microwaves: They will cook your popcorn in just a few minutes! Microwaves in space are used by astronomers to learn about the structure of nearby galaxies, and our own Milky Way!
Infrared: Our skin emits infrared light, which is why we can be seen in the dark by someone using night vision goggles. In space, IR light maps the dust between stars.
Visible: Yes, this is the part that our eyes see. Visible radiation is emitted by everything from fireflies to light bulbs to stars ... also by fast-moving particles hitting other particles.
Ultraviolet: We know that the Sun is a source of ultraviolet (or UV) radiation, because it is the UV rays that cause our skin to burn! Stars and other "hot" objects in space emit UV radiation.
X-rays: Your doctor uses them to look at your bones and your dentist to look at your teeth. Hot gases in the Universe also emit X-rays .
Gamma-rays: Radioactive materials (some natural and others made by man in things like nuclear power plants) can emit gamma-rays. Big particle accelerators that scientists use to help them understand what matter is made of can sometimes generate gamma-rays. But the biggest gamma-ray generator of all is the Universe! It makes gamma radiation in all kinds of ways.
• imagine.gsfc.na...
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رجالة عبد المعبود 💪💪
أنا اهووووووو❤
وانا كمان
احنا الدفعه اللي بعدكو 💪💪
انا دفعه 2024❤
دفعة 2024😂😂
"There are Rays in your room right now"
Me looking around the room: 👁️👄👁️
My cousins, who's last name is Ray:
👁👄👁
Edit: looking back this reply wasn't funny. But they were in my room at the time I commented so, it kinda was then.
dad i must
dad i misses you
not funny. didn't laugh.
very funny. chortled
رجااالة عبدالمعبود❤❤
What kind of person watches a video called "The Electromagnetic Spectrum", which starts off with the title "an introduction to the electromagnetic spectrum" and then voted it down? What could possibly have not lived up to the description, in this clear and neatly explained description of the electromagnetic spectrum on an introductory level?
Madness! Madness, I tell you!!
I like these vids, I watch them and for a few minutes after it i feel smart, then i forget everything i just listened to not long after. =]
Allaaaah
@@freethemuslimworldfreepale3112 No
im here because ofv Schozl
Yes
@@freethemuslimworldfreepale3112 Dude, I am a Muslim too but don't embarrass yourself. There is a particular place, and time for everything. We came here to learn something.
This video reminds me of when I was in college and my professor asked me, do you know why the sky is blue? And I said, I don't know... It turns out that, the light rays from the sun that fall within the blue region of our color spectrum are more strongly scattered by molecules of air and particles of dust within the earths atmosphere.
Imma pretend I got that
@@johaynajk171 HAHAHAHA IKR-
MAN OS THIS OLD
12 years ago 😳 are you still there ?
@@legendary_goku fr old asf
#رجاله_عبد_المعبود🤍
مستر محمد عبد المعبود 🎉😊
I’m just looking at these comments from ten years ago wondering what these ppl r doing now
fr
Fantastic explanation. If i'd had this sort of thing available to me when i was a schoolboy i might've studied physics at degree level rather than finding it too scarily abstract and impossible to comprehend and visualise the concepts. Love stuff like this, it really helps make sense of the world, technology and scientific concepts that i previously found innacessible.
No time like the present, my boy.
yeah seriously, i'm 31 now and been watching these youtube science videos for years now I've become way more interested in subjects I never wanted to bother with before when I was a kid cause I simply couldn't understand any of it at the time and thought " ill never understand this stuff" so I never bothered, soon as videos like this started popping up offering visuals and simple explinations I became fascinated about the world, from geography to science im learning more than I ever did in school in only a matter of days instead of years.
if schools just used these videos to teach we'd have fewer school days less homework and more time to experiment with the knowledge we gain as kids at this speed.
So what? I do agree this type of explanation is better for us to understand, but you are naive if you think this makes a difference. Just look at the view count on any of these videos. Not many people see them and in schools you won't see these videos, the schools are the same system from 40/50/60 years ago, same shit with same brainwashing process. They dumb down the kids instead of making them smarter. I finished high school 2 years ago and i can tell you i learned more outside of school than inside, literally wasted 12 years of my life on indoctrination called "education". Now i study everything from nuclear physics to computer science and other topics, topics you've never heard about in school.
I agree too, very good explanation, thanks
Bruh I’m just here for school my guy
The Electromagnetic Spectrum really is a fascinating force to see, it is so mysterious yet so intriguing
who’s here for online school
Me
Anita Ahr Me ;c
me
me lol
Probably half the people here
thank you ..this was very understandable and yet very simple ...most teachers like mine make it look so complicated
رجالة عبد المعبود 🥰
رجاله عبدالمعوووود ❤❤
3bd el ma3boood❤
الي جاي من عند مستر محمد عبد المعبود ☝♥️
مستر عبد المعبود ⬆️
Who's here because of school
Me
me too
Me😒
I'm here because I generally want to learn
+Kunzite Universe ^
A very good introduction to the subject of the electromagnetic spectrum by NASA. So I was very surprised that there is an error in this otherwise fantastic video. At minute 2:47 the narrator says "..and GPS units in the cars driving by". GPS signals are emitted ONLY from the satellites in space. All they do is continuously broadcast a radio signal saying what time it is. The GPS unit in your car (or phone) reads the time signals from four or more satellites and compares their discrepancies. As radio (or light) travels approximately one foot each nano-second, the time readings from the further satellite will read an older time by the GPS unit. Distance from that broadcast can then determined and along with the distance to the other 3 or more satellites overhead, using simple geometry, one can then determine the receivers location on (or above) the earth. The GPS unit in your phone emits nothing by itself. Of course your phone (or car) will then likely send your information to whatever computer the map (or other) application is connected to over your phones data radio, and THAT DOES emits electromagnetic radiation. But by itself. GPS does NOT broadcast your position. (So any conspiracy folks out there can relax a tiny bit now about that particular meme.)
So your saying it would be more appropriate for the waves in the animation to be coming from over head down to the gps units?
+Symphonics The animation doesn't actually show any cars going by, but yes the narration is absolutely in error I that point. Other EM radiation from overhead would be Dish network TV, satellite radio, air traffic from planes, as well as the general EM on all bands put out by the sun and the universe in general but they are saving that for later I suspect.
And the phones using the GPS are sending signals to the towers that go through your indoor environment as well.
"And the phones using the GPS are sending signals to the towers.."
Absolutely, but that has nothing to do with the GPS itself. Google Maps on your phone continually tracks you on your daily movements and some of those are abstracted and sent out to Google at some point but that has nothing to do with GPS itself. In fact, if you let Google Maps download your local area it is perfectly useable by going into airplane mode but leaving location services enabled. The GPS radio is a receiver only.
Early stand alone GPS units such as Garmin also have no ability to broadcast anything.
If your phone is not a smart phone and has no GPS your cell phone carrier can still track your location crudely to about 4 blocks simply by using the information used by the basic housekeeping functions of the cell radio in your phone. The cell phone system relies on communication about every 30 seconds or so to locate the nearest cell phone tower so when you do receive a call the cell phone system knows which base stations to use to ring your phone and complete your calls.
Google, Apple, Microsoft, and Blackberry (and various applications on your phone such as Uber and Angry Birds!?!) also collect this location information along with Wi-Fi and even Bluetooth location information to improve the accuracy of their mapping functions (or just to aggregate more data on you for future use.)
But again. The GPS radio is no different from the FM receiver in your devices, they are receive only.
The tin foil hat people all think that GPS satellites receive information from your phone which is just sad and silly.
nerds
All I took from this video:
Light is magnetic.
What? No. Light isn't even magnetic.
I'm here because my teacher wants me to explain electromagnetic spectrum through video. This video helps me a lot TY.
"whos here for online school"
no im here on a Monday at 3 in the afternoon learning about The Electromagnetic Spectrum bc i just felt like it. yes im here for online school
PLS
me
calm down jamal dont pull ou
personally i absolutely love my nerd life
Here because of school
Me 2 m8
Me
Same
gosh me too
Kasey Bernas hahaha me too
An excellent explanation for my middle school science classes. Thanks. I talk and they tune out. I put on a video and the listen.
WOW!!! thanks for the invite to you station!! LOVE IT!!! good job!
Excellent video animation! Sufficient examples and applications were given to understand the concept
Here because tomorrow I am having presentation on EMS. Thanks very much for fine stuff. Much appreciated. I wish I could have learnt Physics in this way.
8th Grade Earth Science HW got me like
YBN Nick lmao relatable
Omg sameeee!
YBN Nick oop 7th for me
Josie Korff weird flex bit ok
NorthernRat good for you. at my school 8th grade is advanced to take that class, 9th normal
This video is by far the best I've seen. I feel much more comfortable with these materials now. Thank you, BestOfScience!
1:11 -- "text message" and shows a calculator
thats a phone... its on the number screen
@@alaaranga2765 That's the joke bruh
@@binkbunkspiggleworm ok
1980s calling
I am dying 😭 😭😂
ah. this cleared my whole doubt about EM RAYS. A BIG THANKS TO YOU
WHY DID THEY GIVE ME THIS VIDEO - this doesnt even answer the question in the textbook. im crying
What's the question
@@tacolad381 its ok! i dont need help anymore. it was about dispersion, but i got it now. i asked my friend. thank u for trying to help though!
Can you answer mine?
5 lessons that you learned from this video...
😢
@@nicolemolina1714 can i help you tomorrow? going to sleep rn
Another country huh..
I'm from the philippines btw
Why do people feel the need to say "first" in their comments? It's not like you get some sort of recognition or award for seeing a video first.
Other than that, another great video "Best0fScience"
Perfect. Thanks for posting!
10 years ago
did you die from covid?
@Brixton Carlisle YOOO
wow
whered u goo
Well done. This is complicated information and most people don't want to take the time to understand the basics. But this video does a good job with the basics.
Who is here because of online school
Watching in lockdown.
Like 👍🏿👍👍🏽👍👍👍
That intro was amazing.
thank you for helping me understand physics better :) great vid!
For you who are on online schooling, spirit Sciences sacred geometry is an excellent source of understanding the big picture.
Hey kiddos, drop this bomb on your teachers: tell em you cannot take a video seriously that states that GPS units emit electromagnetic radiation. They emit nothing if they're not wifi or bluetooth capable. They simply receive the navstar satellite signals, 3 or more to triangulate 3-dimensional position relative to the satellites, lol.
Anyone else notice the uplifting, inspirational music in the background?
مفيش حد هنا لمستر عبدالمعبود خالص😂😂😂
مش لوحدك
I am an mech engineer by profession. I came here because I am fantasize by Theory of relativity & speed of light. So to understand light, first I need to know about electromagnetic waves, radiation. That's why I am here
I need to watch this more often for school
Same
here's a trick for people on computers who are required to watch this video but can't process information via audio, like me; click the meatball menu beside the 'save' icon above the subscribe button and click 'open transcript.' it lists the subtitles as one block of text and you can click the timestamp to go to the corresponding part in the video. thank me later ;)
oh my god thank you
This video is excellent
The dawn is breaking A light shining through You're barely waking And I'm tangled up in you Yeah I'm open, you're closed Where I follow, you'll go I worry I won't see your face Light up again Even the best fall down sometimes Even the wrong words seem to rhyme Out of the doubt that fills my mind I somehow find You and I collide
..... oh sorry just singing along to the background music, it sounds like that one song.....
Excellent video! Now I'm intrigued enough to start studying this field just for clarification on how it all works and who were the genius(s) who helped develop this!
Tesla. Just think, most of Earth will be getting FREE power soon!
npc
Great video!
As an electrical engineering student, I can say that this 5 minutes video helped me understand waves better than the university classes I have had on the subject. It talks a lot more than equations and numbers.
who else looked around to see the waves
I think every one
nobody looked you retard
@@alexandramorales3084 i didnt
Very clear and easy to understand
The intro is terrifying with different music.
Cont 2
So simply inputting more energy into an e.m. wave generator (for instance; a radio transmitter) will not automatically raise its output freq. but to raise its freq. while maintaining its amplitude you'll have to input more energy
The above example with 10 Hz, 100 Hz and amplitude 5 is not exactly what happens but it makes understanding the principle much easier than also accounting for the fact that you'd also have 1/10th the time to generate each cycle, this also costs extra energy
Very well made video! We must have a universal process with particles of electromagnetism called photons interacting with the atoms.
There's an error in 3:30. Red light ends at 700nm and violet on 400nm. It's opposite in the picture.
So my teacher sent me a link to this vid to answer a question and I was too lazy so I guessed and I got a 100% on the thing so 🤷♀️
Brings lessons from science lessons ❤️- miss it #leavers2021
جاي من ملزمة مستر محمد عبدالمعبود 🇾🇪
Thanks for showing different waves and their characteristics
One thing I always wondered is if there are any humans that could be able to see different electromagnetic waves.
humans are able to see different electromagnetic waves....red light and blue light are different electromagnetic wave...they may come under visible light category but they have different wavelength.
Very useful information
wHoS hEaR foR scHoOl?/?/?/?
*hear*
@@m9ddie yES
next level editing, how did you do that😱😱
Looks like we'll all have to go to school just to protect.ourselves in the near future. We want our life styles or not. Nothing is ever free. Not an option to be afraid of something just because you can't see it, communications is pushing us along the learning curve whether we like it or not.
HP Lovecraft heard about light we couldn't see and immediately decided to write a "Horror" story about very colorful aliens.
طلاب عبدالمعبود كلهم قاعدين بيسمعو 😂❤
Is it just me or are all the videos our teachers make us watch are from 19 something something hundreds?!! 😂
2:50 - All those waves, shit, we are all going to die :)
You were ahead of your time ;)
oH nOo! NoT tHE 5G!!1!!
@@oshotz But who would have known the 5G was going to cause Covid? :-P
wow, all that 3d animation looks great, I hope it was all created just for this. I know how long it would take to create it and I think it would be easier to get some live b-roll.
now I have the itches knowing there are trillions of invisible waves from countless sources going through my body constantly. especially my genitals which I already subject to high frequencies throughout the day. and night.
THX ALOT
manualLaborer 👀
AHAHAHAHAHAHAHHAHAHAHAHAHAHAHAHAHHAH. Thats funny
The best video on EM waves I've ever watched. Very intuitive indeed.
مين هنا جي من عند عبد المعبود😂
+1😂😂
1:26 Thank you for answering the question: what are electromagnetic waves? I have been looking for the answer for a long time already. They are waves of energy/ energy waves.
عبد المعبود 😁❤
i think all of us are watching this for online school because (not to judge but,) who watchs stuff this in their free time.
wait,can people see thing's in a different color because of the EM waves?
+Sal La yeah! Colors depend on the wavelength. Red light has the shortest wavelength out of the colors in the visual spectrum.
+Sal La what do you mean?
Violet has the shortest wavelength in visible spectrum because it has the highest frequency thus it carries most energy (in the visual spectrum) :)
Sal La
what a wonderful beginner to intermediate talk on the electromagnetic spectrum. Quite a few questions were answered with this vid and that quite a few news ones were given birth to.
it is fantastic
Incredible 👏
جاي من طرف عمي عبدالمعبود
Wow. So simple to grasp.
Who's here from 3bd elma3boud😂😂😂😂😂😂
متتكلم عربي يعم 😅😅😊😢
أنتم السابقون ❤
How can we all use the same wi-fi wave, and make it unique, like giving passwords to different wi-fi even though they are all the same length in wave.
I'm here cuz my mum said I had to
@Alexis Shoulders that did not make any sense
This video shows that electromagnetic spectrum cause everything around us appear to have colors, but the video also shows that without these spectrum everything is white when the distant space is black. The space is colorless, the black region that we saw is the very distant background of space where the electromagnetic spectrum have not yet reach due to the intensely fast expansion of the universe, and so it is black. so this explains that without ems everything will be pitch black!
I have an Exam Tomorrow! Thanks A Lot For This Video!!!!!
how did the exam go?
@@Death_zone6627 i'm not sure they would remember an exam from 6 years ago
@@lety7715 they would look at this comment and remember..
*I am confused that what exactly waves look like. Are they like snake travelling in space or they are just the disturbance in medium?*
رجاله عبمعبود 2024💖🫡
@lovinit19791 - Are you asking how they dispose of conventional vehicle batteries or the battery used in the FCX clarity?
For a conventional battery:
The battery acid is removed and neutralised with sodium bicarbonate (or something similar).
The battery is crushed. The lead and polypropylene is separated, melted, molded and sent to be made into new batteries.
200 of them are already starting to be built in Japan.
اعطيك 9/10
I might have missed something in physics class, however at 1:41 they say EM waves move at the constant speed of light, soo...if that's true, how does that account for the Doppler effect, audible sound reaching our ears later than the visual effect?
Even though I already know this stuff this video still feels interesting,this is great stuff people.
Good one. Visual effects are helpful. Thanks for sharing...
رجاله عبد المعبود
Don't think I've ever seen the electromagnetic spectrum explained so clearly and easily.
hello
MY 1ST TIME OF UNDERSTANDING THIS, I HAVE BEEN HEARING THESE BUT DIDN'T KNOW ANYTHING ABOUT THEM
in my #lastminutestudyinglife this really helped.
Love this video! I use it often to help explain EMFs to my clients. Thank you, NASA!