In layman’s terms electromagnetic radiation is light that travels by oscillating in waves at a constant speed carrying energy.
We often hear about electromagnetic waves; they are all over the place nowadays. Wi-Fi signals moving through the air, mobiles communicating using these waves – these are just two of many examples.
Electromagnetic radiation is vital for our current standard of living. But do we understand what these waves actually are? In layman’s terms, light travels by oscillating in waves at a constant speed carrying energy – interactions with objects vary depending on the energy these waves carry.
Electromagnetic radiation (EMR) comprises radio frequencies, microwaves, infrared, light, UV, X-rays, and gamma rays. Human beings cannot “see” or perceive the whole spectrum of electromagnetic (ELM) waves, but they have an essential role in our lives.
From larger to shorter wavelength, the spatial period of the EMR wave, these are the main properties of the ELM spectrum:
The short answer is mostly no. Only a narrow range of waves can produce damage to our bodies. Fortunately, the most hazardous wavelengths, namely X-rays and Gamma rays, are not present in typical situations. There is only UV radiation to take care of, which we can do by limiting exposure to sunlight, using sunscreen cream, and so on.
The rest of the EMR range has from little to zero risk for us in any ordinary circumstances. Radio, microwaves, and infrared cannot penetrate our skin, so these waves do not have any effect on our internal tissues. Moreover, tech manufacturers take precautions to stay in the safest zone possible:
Wireless devices at home operate in microwave frequencies. This radiation bounces off our skin and has zero penetration; thus, it poses no threat to us. Many people wrongly believe mobiles can produce illnesses due to continuous exposure. The radiation levels are too low to have adverse effects on human beings at all. Otherwise, these devices would not have become so ubiquitous in recent years.
Having our wireless installations checked or updated from time to time helps to prevent malfunctioning. Qualified technicians may recommend how to proceed for each case. In most cases, service providers have their protocols to avoid breakdown and to fix any issues quickly. Although safety measures are enforced by law, it can be helpful to double-check.
To be sure about radiating energy in our surroundings, we can use devices designed for radiation detection. Installations and old transmitters could be operating below the current standards. These devices are user-friendly, enabling the user to check radio frequencies and other radiation types in a matter of seconds. They are also easy to carry and operate.
Patti Jo Rosenthal chats about her role as Manager of K-12 STEM Education Programs at ASME where she drives nationally scaled STEM education initiatives, building pathways that foster equitable access to engineering education assets and fosters curiosity vital to “thinking like an engineer.”