Why could diathermy interfere with radio communications?

Why could diathermy interfere with radio communications?

• A. Because it uses radio-frequency energy
• B. Because it uses ultrasound energy
• C. Because it uses visible light energy
• D. Because it uses infrared energy

Answer: (A)

Diathermy generates heat by delivering energy in the radio-frequency range. That RF energy can radiate from the device and couple into nearby radio receiver circuits or communication channels. Since radio communications depend on detecting and decoding RF signals, any additional RF energy from the diathermy unit can introduce noise or spurious signals, degrading transmission or reception and causing interference. The other energy forms—ultrasound, visible light, and infrared—do not operate in the radio-frequency bands used for wireless communications, so they don’t cause the same kind of EMI. In practice, this means diathermy can disrupt radio communications if proper shielding, grounding, or spacing isn’t maintained.

Diathermy generates heat by delivering energy in the radio-frequency range. That RF energy can radiate from the device and couple into nearby radio receiver circuits or communication channels. Since radio communications depend on detecting and decoding RF signals, any additional RF energy from the diathermy unit can introduce noise or spurious signals, degrading transmission or reception and causing interference. The other energy forms—ultrasound, visible light, and infrared—do not operate in the radio-frequency bands used for wireless communications, so they don’t cause the same kind of EMI. In practice, this means diathermy can disrupt radio communications if proper shielding, grounding, or spacing isn’t maintained.