8,700 Studies Reviewed. 87.0% Found Biological Effects. The Evidence is Clear.
Shield Your Body
Whole Body / General

Interaction Between a Linearly Polarized Electromagnetic Plane and a Double Spherical Shell

Bioeffects Seen

Daniel L. Dawes, Jerry W. Gaskill · 1972

Share:

Air-filled materials like styrofoam block 2450 MHz microwave radiation better than solid plastics like Plexiglas.

Plain English Summary

Summary written for general audiences

This 1972 engineering study calculated how 2450 MHz microwave radiation (the same frequency used in microwave ovens) penetrates through double-walled plastic chambers designed for animal experiments. The researchers found that air-filled materials like styrofoam would provide better protection than solid plastics like Plexiglas or Teflon.

Why This Matters

This technical study reveals a critical insight about microwave radiation exposure that extends far beyond laboratory settings. The finding that air-filled materials provide superior protection against 2450 MHz microwaves has direct implications for understanding how EMF interacts with everyday materials in your home and workplace. The 2450 MHz frequency studied here is identical to what microwave ovens use and very close to WiFi frequencies (2400-2484 MHz). What this means for you: the materials around you during EMF exposure matter significantly. Dense plastics that might seem protective actually offer less shielding than you'd expect, while air-filled materials provide better barriers. This principle applies whether you're considering phone cases, building materials, or positioning yourself relative to EMF sources.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
Daniel L. Dawes, Jerry W. Gaskill (1972). Interaction Between a Linearly Polarized Electromagnetic Plane and a Double Spherical Shell.
Show BibTeX
@article{interaction_between_a_linearly_polarized_electromagnetic_plane_and_a_double_sphe_g4196,
  author = {Daniel L. Dawes and Jerry W. Gaskill},
  title = {Interaction Between a Linearly Polarized Electromagnetic Plane and a Double Spherical Shell},
  year = {1972},
  
  
}

Quick Questions About This Study

Air-filled materials like styrofoam create multiple interfaces that scatter and absorb electromagnetic waves more effectively than dense, solid plastics. The air pockets disrupt wave propagation, providing superior shielding against 2450 MHz radiation compared to continuous plastic materials.
The study specifically analyzed 2450 MHz microwave radiation, which is the same frequency used in microwave ovens and very close to WiFi frequencies (2400-2484 MHz). This makes the findings relevant to common household EMF sources.
The double-walled spherical chambers were designed as environmentally controlled exposure systems for laboratory animals during microwave irradiation experiments. The shells allowed researchers to study biological effects while maintaining controlled conditions during EMF exposure.
Yes, the principles apply directly since WiFi operates at 2400-2484 MHz, nearly identical to the 2450 MHz studied. The finding that air-filled materials outperform solid plastics for EMF shielding remains relevant for modern wireless radiation protection strategies.
The physics of electromagnetic wave interaction with materials hasn't changed. The 2450 MHz frequency studied matches modern microwave ovens exactly and closely approximates WiFi frequencies, making the material shielding principles directly applicable to current EMF protection needs.