How to insulate an object with electromagnetism?

[Atran]

Hi. I've got two questions.

Is it true that waves with longer wavelengths are handled easier?

Think of a scenario where radio-waves insulate a solid object (in a lab for example). How can this be done? Given my understanding, waves don't travel around the environment uniformly.

 

[Delta2]

yes well, it is easier to shield objects from waves with longer wavelengths because such waves can't penetrate through small openings and imperfections of the shielding material. As a rule of thump a wave can't penetrate and will be mostly reflected by an opening if the opening dimensions are smaller than 1/10 of its wavelength.

Waves don't travel uniformly indeed because they get reflected/refracted/e.tc from the various objects they hit in their way, and also the antennas that emit those waves are not perfect isotropic radiators, that is they don't emit the same amount of energy spherically in all directions, some directions are favored. For example a center fed dipole antenna emits much more energy in the direction perpendicular to the axis of the dipole, than the direction parallel to the axis of the dipole.

 

[Vanadium 50]

Think of a scenario where radio-waves insulate a solid object

Insulate against what?

 

[Atran]

Insulate against what?

Against waves of other wavelengths. Imagine an object surrounded by a "sphere" of waves of a certain wavelength, that shields the object from waves of other wavelength.

Am I correct in saying that x-rays can penetrate radio-waves while the reverse is not true?

 

[Delta2]

You need a proper material to shield an object from incoming waves, you can't shield it from waves of specific wavelength using waves of another wavelength. When two waves of different wavelength meet in space the result is a wave that is an addition of the two waves (principle of superposition).

 

[Vanadium 50]

Imagine an object surrounded by a "sphere" of waves of a certain wavelength, that shields the object from waves of other wavelength.

Not possible. Electromagnetic waves are linear.

 

[artis]

what you can do is put a physical conductive sphere around whatever you want to protect and no EM will get through , if you want to block all frequencies starting from the very low up to ionizing radiation you can just make your sphere very thick and job done.

for radio wave blocking such spheres and meshes are called "Faraday cage".