This thing we're talking about today, you may be using it every day, watching it, listening to it, but most people don't know what it is — it's an electromagnetic wave. Don't worry, listen to me. It's actually even cooler and more amazing than you think。
What the hell is emp? In short, it's an "unseeable energy wave." don't think that the metaphor of “waves” is out of line — it really spreads like waves in space, except that it is not made of water, but consists of “electric field” and “magnetic field”。
You can imagine a pair of “dance mates”, dancing in the air in sync: electric fields and magnetic fields vibrate vertically and simultaneously, and then “run” together. This “energy wave” can fly in a vacuum — that is, without air, without water, it can run fast。
And it's amazingly fast -- close to the speed of light! About 300,000 kilometres per second! Can you imagine? We can go around the earth seven times a second。
What are our "partners" in the electromagnetic waves that we deal with every day
From the morning when you opened your eyes, the first sun came into the room, you used your mobile phone to shudder, watch the video and even sleep in bed listening to the song with a bluetooth earphone, and the electromagnetic waves were “accompanied” to you。
They all look different. They do different jobs:
Visible light: the light we see in our eyes is from the rainbow, the light bulb. Without it, the world is black。
Radio waves: “tripman” used to transmit radio and television signals. Your radios, tvs, cell phone signals are on them。
Microwave: heating food in microwaves, also in mobile phones, wi-fi, bluetooth。
Infrared: running around with "heat", which is used for remote control, night vision, thermometers。
Ultraviolet light: the "turkish part" of the solar light can make you black and bacterial, but excessive exposure can hurt skin。
X-ray: the hospital's “black technology”, which helps doctors look at bones and bodies。
Gamma rays: the most “strong” electromagnetic wave for cancer therapy, astronomical exploration。
Do you think the electromagnetic waves are like the "herohero alliance" that do our job and protect our lives
Why is the electromagnetic wave so cow? What are its "magic powers"
The power of electromagnetic waves is amazing:
Transmission speed: almost light speed! The transmission of information is hardly delayed。
There is no need for media: it can spread in a vacuum, like space. You can use the radio and mars detector "dialogue."。
Multipurpose: different frequency bands have different uses, from broadcasting to medicine, from astronomical to kitchen。
Let us “see”: scientists use them to explore the mysteries of the universe and even to “see” black holes and galaxies。
Life's “one-size-fits-all keys”: remote control, mobile phones, microwave ovens, security devices ... They all have to be electromagnetic waves。
Is it dangerous? How do we use it safe
Of course, electromagnetic waves are not “total risk-free”. For example, ultraviolet light can tan the skin, and too much x-ray exposure may increase cancer risk。
So in our daily lives, we have to pay attention to:
Avoid looking at strong light for long periods of time, such as sun or ultraviolet light。
When using microwave stoves, ensure that the lids are tightened to avoid microwave leaks。
Cell phones don't stick their ears long enough to keep their distance。
When the hospital does x-rays, it follows the doctor's advice and does not film frequently。
If used rationally, electromagnetic waves will make our lives easier and richer。
In the future, electromagnetic waves will only be used more and more, for example:
5g, 6g: faster and more stable wireless networks, making vr, ar, auto-driving more realistic。
Space communications: more advanced electromagnetic wave technology and mars, moon dialogue。
Medical technology: accurate diagnosis and treatment of diseases with high-frequency electromagnetic waves。
Green energy: transfer new energy with electromagnetic waves to reduce energy waste。
It can be said that electromagnetic waves are like an "invisible highway" connecting the future technology world。
Think it's magical and close to life? In fact, it's like the air. It's invisible, but it's always affecting our lives。
When you turn on your phone, listen to the radio, use the microwave, and suntan, don't forget — these are electromagnetic waves that help. They use invisible magic to make our world a better place
