You will be surprised to know that technology today can do this

Technology has grown at a dizzying pace, allowing things to seem like only fictional films.

The development of technology can be said to be no limit. 100 years ago, who dared think TV would be everywhere like today? Or something as luxurious as a mobile phone has become so popular that 3-year-old kids can also use the iPad, the iPhone is free .

And today, we will come together with a very good machine, clearly demonstrating how progressive technology is.First, take a look at this picture and say: What do you see?

See the rust and see nothing more.

In the past, if you wanted to fly this metal rusty, you could only use sticks, scrapers, or chemicals to neutralize the metal oxide.

However, these two ways are either wasteful, or harmful to health. Moreover, chemical substances can accidentally erode the metal surface, making the material texture more fragile.

However, as stated, the development of science has helped people solve this problem more gently by a very . method: using lasers.

"Good" yet?

The key here is that they use power with voltage up to 1000W.

This iron scraping technology is implemented by a Canadian company. The key here is that they use electricity with voltages up to 1000W, emitting extremely powerful, ultra-fast laser pulses with extremely short wavelengths, to create ultra-small plasma explosions.

These explosions will form shocks and heat pressures, helping to propel plaque - here rust . At the same time, the focal length of the laser will be precisely adjusted so that it only affects the outer rust layer, instead of the internal metal surface.

So what happens if this laser gun accidentally hits our skin?

See the image below for answers.

Why does the laser look so dangerous that it doesn't harm our skin?

Oh, why does a laser look so dangerous that it doesn't harm our skin? In fact, if it's shining for a long time, it's a starry sky.The reason is that this system works based on the heat of the laser , but it only works if the surface absorbs enough energy to produce heat.

Meanwhile, the man in the picture has white skin - helping to reflect almost all of the light from the laser. Because of this, the fast-moving laser across the hand will have no consequences.

However, if you have a dark skin, especially black as "fire pillar", never think about giving your hands on this "aggressive" laser , because you will surely regret it if do this.