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MICROWAVE REFLECTION, DIFFRACTION AND TRANSMISSION BY MAN - A PILOT STUDY

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Vernon R. Reno, Dietrich E. Beischer · 1973

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Navy researchers studied how microwaves reflect, bend, and pass through human bodies in foundational 1973 physics research.

Plain English Summary

Summary written for general audiences

This 1973 pilot study by Navy researchers examined how microwaves interact with the human body through reflection, diffraction, and transmission. The research investigated the fundamental physics of how microwave radiation behaves when it encounters human tissue. This early work helped establish the scientific foundation for understanding microwave absorption and scattering by biological systems.

Why This Matters

This pilot study represents crucial foundational research into how microwaves interact with human bodies, conducted during the early years of microwave technology development. Understanding reflection, diffraction, and transmission patterns is essential for predicting how much energy actually penetrates tissue versus how much bounces off or bends around the body. The reality is that this type of basic physics research, conducted by Navy scientists in 1973, laid the groundwork for modern specific absorption rate (SAR) calculations used in cell phone safety testing today. What makes this particularly relevant now is that our daily microwave exposures have increased exponentially since 1973. While this study focused on fundamental physics rather than biological effects, the interaction patterns it investigated directly determine how much energy from WiFi routers, cell phones, and other microwave devices actually enters your body versus reflects away.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
Vernon R. Reno, Dietrich E. Beischer (1973). MICROWAVE REFLECTION, DIFFRACTION AND TRANSMISSION BY MAN - A PILOT STUDY.
Show BibTeX
@article{microwave_reflection_diffraction_and_transmission_by_man_a_pilot_study_g4907,
  author = {Vernon R. Reno and Dietrich E. Beischer},
  title = {MICROWAVE REFLECTION, DIFFRACTION AND TRANSMISSION BY MAN - A PILOT STUDY},
  year = {1973},
  
  
}

Quick Questions About This Study

The study investigated reflection (microwaves bouncing off the body), diffraction (microwaves bending around the body), and transmission (microwaves passing through body tissue). These three physics phenomena determine how much microwave energy actually penetrates human tissue.
This pilot study was conducted during the early development of microwave technology to understand fundamental physics of how these waves behave around humans. The Navy needed this basic science to predict exposure patterns and energy absorption.
When microwaves reflect off the body's surface, that energy bounces away rather than penetrating tissue. Understanding reflection patterns helps predict which body areas absorb more energy and which are naturally protected by the body's geometry.
Diffraction occurs when microwaves bend around the curved surfaces and edges of the human body, similar to how water waves bend around obstacles. This bending affects which body areas receive direct versus indirect exposure.
The physics principles studied in this pilot research form the foundation for today's specific absorption rate calculations. Modern SAR testing uses these same reflection, diffraction, and transmission concepts to predict how much energy cell phones deposit in tissue.