<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
On 8/24/2011 12:05 PM, R. Zev Sero wrote:
<blockquote
cite="mid:mailman.14777.1314201915.21726.avodah-aishdas.org@lists.aishdas.org"
type="cite">
<pre wrap="">there are mekoros that say the moon still has its own light, that only shines when it's
stimulated by sunlight.</pre>
</blockquote>
Here's an interesting piece that shows things are not as simple as
popular opinion thinks (from
<a class="moz-txt-link-freetext" href="http://www.universetoday.com/75891/why-does-the-moon-shine/">http://www.universetoday.com/75891/why-does-the-moon-shine/</a>):<br>
<br>
"The real mystery is why does the moon reflect at all. Like most
objects in space, the Moon possesses a reflective characteristic
called albedo. Albedo is how well an object reflects light. This
characteristic seems pretty straight forward. Material like ice and
snow have very reflective albedos. Land and Greenery have very low
reflective albedos. *What makes the moon so interesting is that it
has the same Albedo as coal. That means that it has almost no
reflective quality up close.* So when the Apollo mission were going
on the Moon was actually a pretty dark place. This only makes sense,
because of the large lava plains that it has.<br>
"The reason why the moon still seems so reflective is because of an
interesting effect called the opposition effect. The opposition
effect basically states that certain types of non reflective
surfaces lose their shadows when directly in the line of sight of
the light source shining on them. This why a road at night lit by
head lights will seem to brighter than it is. The reason that moon
does this so well is the loose regolith that covers most of its
surface. The opposition effect is strongest for the moon when it is
directly in the opposite position of the Sun in relation to the
Earth."<br>
<br>
Zvi Lampel <br>
<strong></strong><br>
<br>
</body>
</html>