What frequency range is commonly designated for medical diathermy and industrial heating applications?

The correct frequency range commonly designated for medical diathermy and industrial heating applications is 3-30 MHz. This range is particularly relevant because it falls within the radiofrequency (RF) spectrum, which is effective for inducing heat in tissues and materials due to dielectric heating.

In medical diathermy, the application of high-frequency electric currents generates heat within the body, aiding in pain relief and the promotion of tissue healing. The specified frequency range allows for effective penetration into tissues while minimizing the risk of overheating or damaging healthy cells.

In industrial heating applications, particularly in processes such as welding, drying, and curing, the use of RF energy in this frequency range enables efficient heating of materials. It allows for rapid thermal processing without significant heat transfer losses.

Understanding this frequency range is essential for industrial hygienists because it relates to how energy is used in both medical and industrial contexts, which can have implications for safety standards and exposure limits.