We all very good know dopper for light <br /><br />what about intensity of signal ( LUX power )<br /><br />I have kindly ask anyone can help me prepare simulation ( solar system model and intensity of signal problem )<br /><br />Inverted Square Law <br />[img]http://www.zipheron.com/images/projects/islMeter.jpg[/img]<br /><br />Doppler <br />[img]http://www2.astro.psu.edu/users/cpalma/astro10/Images/FG02_22.JPG[/img]<br /><br /><br /><br />sensor ----&gt; V1 ----------R distance ----------------Source -------&gt; V2 <br /><br /><br />if V1 &lt;V2 <br />sensor will register RED shift and step by step lower intensity of signal ( level of signal will go down )<br /><br /><br />if V1 =V2 ???? astronomers think that we have 20 km/s <br /><br /><br /><br />sensor 1 -----------150 000 000 km -----SUN&nbsp; -----------150 000 000 km -----sensor 2&nbsp;  -------&gt; 20 km/s <br /><br /><br />sensor 1 will register biger brightness <br /> <br />