alleryStart learning →Microwave frequencies suit communication applications because such waves tend not to be:
AReflected by any metal surface
BGenerated by ordinary devices
CDetected by standard receivers
DAbsorbed by building materials
Answer & Solution
Correct answer: D. Absorbed by building materials
1. A signal is only useful if it survives the journey to the receiver.
2. Different regions of the spectrum interact with matter in different ways.
3. The frequencies associated with these applications are convenient because such waves tend not to be absorbed much by common building materials.
4. A wave strongly absorbed by walls would be useless for indoor communication.
5. Reflection by metal is real but is a separate effect from absorption.
_Source: OpenStax Chemistry 2e (CC BY 4.0), Ch 6 'Electronic Structure and Periodic Properties of Elements', sections 6.1-6.5_
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