Attenuation increases with both frequency and distance.

Attenuation increases with both frequency and distance.

• A. Attenuation decreases with frequency and distance
• B. Attenuation increases with distance but decreases with frequency
• C. Attenuation independent of frequency and distance
• D. Attenuation increases with both frequency and distance

Answer: (D)

Attenuation is the loss of signal strength as it travels through a medium. As distance grows, more energy interacts with the medium—being absorbed, scattered, or radiated away—so the total attenuation accumulates along the path. Frequency matters because many materials and transmission mechanisms become more lossy at higher frequencies: dielectric losses rise with frequency, skin effect increases conductor losses, and scattering grows for shorter wavelengths. This means higher frequency components are damped more quickly, boosting attenuation for a given distance. So the statement that attenuation increases with both frequency and distance captures how real-world propagation behaves. The other possibilities conflict with this: attenuation does not typically decrease with frequency, nor is it independent of distance.

Attenuation is the loss of signal strength as it travels through a medium. As distance grows, more energy interacts with the medium—being absorbed, scattered, or radiated away—so the total attenuation accumulates along the path. Frequency matters because many materials and transmission mechanisms become more lossy at higher frequencies: dielectric losses rise with frequency, skin effect increases conductor losses, and scattering grows for shorter wavelengths. This means higher frequency components are damped more quickly, boosting attenuation for a given distance. So the statement that attenuation increases with both frequency and distance captures how real-world propagation behaves. The other possibilities conflict with this: attenuation does not typically decrease with frequency, nor is it independent of distance.