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<p>[QUOTE=&quot;physics-fan3.14, post: 8648895, member: 19165&quot;]Have you ever hit a nail with a hammer, and the hammer bounced a bit? </p><p><br /></p><p>Now, imagine you have a very large hammer and instead of a nail you have a die. Hit that die with your big hammer, and I&#039;ll bet there&#039;s a good chance it bounces a bit. Now, that die just bounced on that soft copper sheet... boom. Double image.[/QUOTE]</p><p><br /></p>

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