Can electromagnetic waves penetrate walls, and can electromagnetic waves penetrate concrete walls? T

Most electromagnetic waves.

Be able to go through the walls, otherwise you wouldn't have heard a cell phone signal at home, a radio.

The broadcast signal will not be received. However, the camera "captures" visible light waves or infrared light waves (there are no "electromagnetic wave cameras"), although these also belong to the category of electromagnetic waves, but because the wavelength is too short, they cannot pass through the wall.

Electromagnetic waves can be divided into many types depending on the wavelength and frequency. Sunlight, wifi, cell phone signals, X-rays, and many more are all examples of electromagnetic waves. The longer the wavelength, the better the penetration performance of electromagnetic waves, such as wifi signals and mobile phone signals can pass through walls.

Metal walls are not easy to penetrate, and concrete walls are easy to penetrate.

I have studied in the field of engineering for many years, and I have never heard of "electromagnetic wave cameras". This name is very unprofessional, because most cameras that rely on light use electromagnetic waves. If you want to see through the wall, you can use a thermal camera, but the shooting effect is certainly not as good as when you don't have a wall.

Why do I always think that the shorter the wavelength, the stronger the penetration, and the longer the wavelength, the stronger the winding force?

For example, the electromagnetic wave with a longer wavelength For example, its wavelength is long, so it can be easier to go around, and it is not easy to penetrate the steel plate and other denser objects than the wall, and the longer wavelength such as 5GHz Its wavelength is short, relative to the wall, it is the ability to go around, so the ability to go around the back will be weakened, but if it encounters a denser object than the wall, it can show its penetration, such as X-ray is shorter than wifi electromagnetic wavelength, visible light is in between, and the frequency of X-ray is definitely higher than that of electromagnetic waves, As you said, the higher the frequency, the lower the penetration, how does the X-ray penetrate?

No. The longer the wavelength, the weaker the penetrating ability, and the stronger the reflective ability. The wavelength of wifi is longer than that of visible light, indicating that the visible light penetration ability is stronger under the same power, and the signal strength of wifi is much smaller than that of strong light, and strong light cannot penetrate walls, let alone wifi.

The so-called penetration of the wall by wifi relies on reflection and diffraction (wavelength of about 12cm).

Summary. Can pass through walls. If the transmitting power is higher, the thicker the wall will be traversed. If the wall is thicker and the transmit power is the same, then the probability of penetration is less. If the wall is denser (with more metal components), the less likely it is to pass through.

Hello dear! OK.

Can pass through walls. If the transmitting power is higher, the thicker the wall will be. If the wall is thicker and the transmit power is constant, the less likely it is to penetrate the bend. If the wall is denser (with more metal components), the less likely it is to pass through.

Most electromagnetic waves can pass through walls, otherwise you wouldn't have heard a hand-based signal at home, and the radio wouldn't have received a radio signal. However, Nozen is a camera camera that "captures" visible light waves or infrared light waves (there is no "electromagnetic wave camera"), and asks that although these omen also belong to the category of electromagnetic waves, they cannot be answered through the wall because the wavelength is too short.

To put it simply, it can be done in front of Huai. Otherwise, your wireless ** will have no signal, and your TV antenna (the hole in the room, the kind of two sticks) will not be able to receive the program. However, different frequencies and different intensities have different penetrating abilities to objects, so it can also be said that the wall can shield some electromagnetic radiation.

This is a matter of specific analysis.

Can a microwave go through a wall?

Microwave is OK.

The propagation of electromagnetic waves includes ground waves that propagate along the ground, air waves that propagate from the air, and sky waves. The longer the wavelength, the less attenuation, and the longer the wavelength of the electromagnetic wave, the easier it is to continue to propagate around obstacles.

Both mechanical and electromagnetic waves can be refracted and reflected, diffracted and interfered with because all waves have wave-particle duality. Refraction and reflection belong to particles; Diffraction and interference are waves.

You can use your cell phone in a closed room. But radio waves.

You can't go through the walls, you can only go around them!

The 5th floor is wrong, not because the wavelength is long, so the penetration is strong. Penetration in physics does not mean this, it refers to the ability to pass directly through matter, and radio waves do not allow us to receive radio waves because they can pass through thick walls. Filial piety.

Essentially, the shorter the wavelength, the stronger the penetrating power of the wave. For example, X-rays.

The penetrating force is stronger than radio waves, and gamma rays with shorter wavelengths.

More penetrating.

The 3rd floor is right.

The essence of the reason why radio waves can "pass through" the wall is that the wavelength of radio waves is extremely long, such as long waves can reach 1000 10000m, so radio waves are easy to diffract (the size of ordinary obstacles can rarely be larger than the wavelength of radio waves), so radio waves can easily bypass obstacles and be received by us.