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<p>relationship between payload weight and launch cost of a launch vehicle.</p>

<p>In 2020, the <a href="page.php?w=United_States_Naval_Research_Laboratory">US Naval Research Laboratory</a> conducted its first test of solar power generation in a satellite, the Photovoltaic Radio-frequency Antenna Module (PRAM) experiment aboard the <a href="page.php?w=Boeing_X-37">Boeing X-37</a>.</p>

<p><big> History </big></p>
<p>The <a href="page.php?w=photovoltaic_effect">photovoltaic effect</a> was experimentally demonstrated first by French physicist <a href="page.php?w=Edmond_Becquerel">Edmond Becquerel</a>.</p><p>
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