Can anti-radiation clothing block gravitational waves? The truth about two kinds of "radiation" →

Do you still remember the anti-radiation clothing for pregnant women, that is, anti-gravitational wave radiation clothing, which was very popular a few years ago? At that time, many women in electronics factories would "spend a huge amount of money" to buy one after they became pregnant. It is said that wearing such clothing can isolate radiation and reduce harm to the baby. Is such clothing really useful?

01 Anti-radiation clothing for pregnant women

Anti-radiation clothing for pregnant women is designed for pregnant women to reduce the potential impact of daily electromagnetic radiation on the fetus. The principle of this clothing is to form a shielding layer through metal fiber or silver ion fabric to reflect or absorb some electromagnetic waves. Later it was proved to be unfounded. Because the intensity of daily electromagnetic radiation is far lower than the international safety standards (such as ICNIRP), there is currently no scientific evidence that it is harmful to the fetus.

At that time, I, a physics idiot, went to read the content of gravitational waves in order to dispel the rumors about gravitational wave protective clothing. Now let's talk about gravitational waves.

02 Can you prevent something that even scientists can’t?

Gravitational waves can penetrate almost all matter, whether it is the vast universe or our sophisticated scientific instruments. Because of this, we can observe gravitational waves caused by distant cosmic changes on Earth. Here are some devices that have detected gravitational waves.

The LIGO system, which is used to detect gravitational waves in the United States, is located in Louisiana. It is a 4-kilometer-long reinforced concrete device that was slightly shaken by gravitational waves.

The picture below is Japan's KAGRA system for detecting gravitational waves. It is located deep in a huge mine, 1,000 meters away from the top of the mountain. It is protected by various measures. Gravitational waves can still easily penetrate these mountains and rivers, no matter what kind of protection, and then give this device a light bounce.

Excuse me, what kind of protective clothing can achieve this level of protection? They can't protect against gravitational waves. Isn't it a joke for a thin piece of clothing?

03 There is no evidence that gravitational waves are harmful

More importantly, there is no evidence that gravitational waves are harmful to humans.

First of all, this thing exists in the universe, and the universe is full of stars, each of which is a heavyweight player, and will cause gravitational waves. However, sorry, this gravitational wave is so weak that even our most advanced scientific instruments have difficulty detecting ordinary gravitational waves.

Only those gravitational waves caused by violent celestial activities can be barely detected by the most compact scientific instruments. For example, the most recent detection was the gravitational waves caused by the merger of two black holes 1.4 billion years ago, and only this level of gravitational waves was detected.

For ordinary people, how big is the deformation effect caused by this gravitational wave? 10^-21 meters.

Even with such long arms, the strongest gravitational waves will only change the distance between the ends of the arms by at most roughly 10−18 m. LIGO should be able to detect gravitational waves as small as h ~ 5×10−22.

What does this mean? Let me give you an example: the diameter of a hair is about 60-100 microns, which is about 10^-5~4 meters. The intensity of gravitational waves is roughly equivalent to one trillionth of the intensity of a hair.

Not to mention the strength of the wind, even if you gently touch your face with your hand, the strength is greater than this, and can withstand the impact of hundreds of millions of gravitational waves.