# Propagation

### Explanation of question 7

The wavelength defining the VHF band is

1. 0.1- 1 m
2. 1- 10m
3. 10- 100m
4. 100m to 1km

The answer is :- 2

low frequency | (l.f.) | 30-300 kHz
medium frequency | (m.f.) | 300-3000 kHz> (0.3-3MHz)
high frequency | (h.f.) | 3-30 MHz
very high frequency | (v.h.f.) | 30-300 MHz
ultra high frequency | (u.h.f.) | 300-3000 MHz (O.3-3GHz)
super high frequency | (s.h.f.) | 3-30 GHz

From the above table, the frequency band is 30-300 MHz, but . This gives a band .

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