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<p>over distances longer than 360 m, if the target is in proximity to the earth, it may simply vanish into a <a href="page.php?w=mirage">mirage</a>, caused by temperature <a href="page.php?w=gradients">gradients</a> in the air in proximity to the heated surface bending the laser light. All these effects must be considered.</p>

<p><big>Calculation</big></p>
<p>The distance between point A and B is given by<br/>
:where <var>c</var> is the speed of light and <var>t</var> is the amount of time for the round-trip between A and B.</p>

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