The Amateur Radio Project - Propagation

# Propagation

### Question 23 of 30

Maximum usable frequency (MUF) is defined as

1. the highest frequency returned when radiation is vertically upwards
2. the maximum frequency reflected by the ionosphere
3. that frequency at the high end of a particular frequency band
4. the highest frequency that will radiate from an antenna maximum usable frequency

1 | 2 | 3 | 4

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