This is not generally true. E.g.Kyoma said:When an EM wave has a higher frequency, it is able to penetrate materials more easily.
The higher the frequency of an electromagnetic wave, the more easily it can penetrate through materials. This is because higher frequencies have shorter wavelengths, which allows them to pass through smaller gaps and obstacles. In contrast, lower frequencies have longer wavelengths and are more easily blocked by materials.
The Earth's atmosphere can limit the penetration of electromagnetic waves due to absorption, scattering, and reflection. Different frequencies are affected by the atmosphere in different ways. For example, high frequencies are more easily absorbed by the atmosphere, while low frequencies are more prone to scattering and reflection.
The ability of materials to allow electromagnetic waves to pass through them is largely dependent on their physical properties. Materials with high electrical conductivity, such as metals, tend to reflect or absorb electromagnetic waves. On the other hand, materials with lower conductivity, such as plastics or glass, allow electromagnetic waves to pass through with less obstruction.
No, not all materials are penetrable by electromagnetic waves. The ability of a material to allow electromagnetic waves to pass through depends on its physical properties, such as electrical conductivity and density. For example, dense materials like lead can block most electromagnetic waves, while materials with low density, such as air, allow them to pass through more easily.
The power of an electromagnetic wave, which is determined by its amplitude, affects its ability to penetrate through materials. Higher power waves, with higher amplitudes, can penetrate through more materials and obstacles, while lower power waves may be blocked or absorbed more easily. This is why high power electromagnetic waves, such as X-rays, are used in medical imaging to penetrate through the human body and create images of internal structures.