Waves from a Radio Station with a Wavelength of 644

question 39

Multiple Choice

Waves from a radio station with a wavelength of 644 m arrive at a home receiver a distance 50 km away from the transmitter by two paths.One is a direct-line path and the second by reflection from a mountain directly behind the receiver.What is the minimum distance between the mountain and receiver such that destructive interference occurs at the location of the listener? Assume no phase change on reflection.

• A)161 m
• B)322 m
• C)483 m
• D)644 m
• E)1290 m

---

Definitions:

Patient Portal

A component of an electronic health records (EHR) system that allows patients to communicate with their medical office electronically; to request lab results, referrals, appointments; and in some instances communicate with physicians via email.

Kiosk

A small, stand-alone booth used in public places for marketing, information dispensing, or conducting small-scale transactions.

Documentation

The creation and maintenance of accurate records as evidence of transactions, operations, decisions, or processes.

Alleviating Factors

Elements or conditions that can reduce the severity or intensity of a symptom or problem.