The radial velocity V

1.	The radial velocity V
A.	<table><tr><td rowspan="2">V<sub>r</sub> = </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>Vr</center></td></tr><tr><td style="text-align: center;">2h</td></tr></table>
B.	<table><tr><td rowspan="2">V<sub>r</sub> = </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>2Vr</center></td></tr><tr><td style="text-align: center;">h</td></tr></table>
C.	<table><tr><td rowspan="2">V<sub>r</sub> = </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>2Vh</center></td></tr><tr><td style="text-align: center;">r</td></tr></table>
D.	<table><tr><td rowspan="2">V<sub>r</sub> = </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>Vh</center></td></tr><tr><td style="text-align: center;">r</td></tr></table>
Answer» B. <table><tr><td rowspan="2">V<sub>r</sub> = </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>2Vr</center></td></tr><tr><td style="text-align: center;">h</td></tr></table>

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The radial velocity V

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