Electromagnetic energy's ability to pass through holes is influenced by wavelength rather than frequency. Shorter wavelengths require smaller holes for effective shielding, as seen in Faraday cages and microwave screens. For high-energy radiation like x-rays or gamma rays, dense materials are necessary due to their extremely small wavelengths. The discussion highlights the relationship between wavelength and the size of openings needed for shielding, referencing the principle that effective shielding often requires dimensions around one-tenth of the wavelength. Understanding this relationship is crucial for designing effective electromagnetic barriers.
