Space wave propagation is possible for which | vedclass

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Question

(B) Space wave propagation involves the transmission of electromagnetic waves directly from the transmitting antenna to the receiving antenna,typicall

Vedclass · Accepted Answer

$VHF$ (Very High Frequency)

Vedclass · Answer

(B) Space wave propagation involves the transmission of electromagnetic waves directly from the transmitting antenna to the receiving antenna,typically through line-of-sight communication.This mode of propagation is effective for frequencies above $30 \ MHz$.Specifically,it is used for $VHF$ $(30-300 \ MHz)$,$UHF$ $(300-3000 \ MHz)$,and $SHF$ $(3-30 \ GHz)$ ranges.Among the given options,$VHF$,$UHF$,and $SHF$ all utilize space wave propagation. However,in standard physics curriculum contexts,$VHF$ is the most commonly cited range for this mode of propagation in introductory problems. Given the options,$VHF$ is the primary range associated with this phenomenon.

Column $A$	Column $B$
$A$. $D$-layer	$I$. $250-400 \ km$
$B$. $E$-layer	$II$. $170-190 \ km$
$C$. $F_1$-layer	$III$. $95-120 \ km$
$D$. $F_2$-layer	$IV$. $65-75 \ km$

Space wave propagation is possible for which frequency range?

Similar Questions

Match Column $A$ (layers in the ionosphere for skywave propagation) with Column $B$ (their height range).
Column $A$ Column $B$
$A$. $D$-layer $I$. $250-400 \ km$
$B$. $E$-layer $II$. $170-190 \ km$
$C$. $F_1$-layer $III$. $95-120 \ km$
$D$. $F_2$-layer $IV$. $65-75 \ km$

Long range radio transmission is possible when the radio waves are reflected from the ionosphere. For this to happen,the frequency of the radio waves must be in the range:

$A$ square wave of the modulating signal is shown in the figure. The carrier wave is given by $C(t) = 5 \sin(8\pi t) \text{ V}$. The modulation index is:

Which frequency range is suitable for sky wave propagation?

The maximum range $(R_{max})$ of a radar is proportional to:

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