Free Republic
Browse · Search
News/Activism
Topics · Post Article

To: DB

You're just reading what you want to read into it. The quote clearly states that ONLY 5% REACHES THE SURFACE of the Earth. That is what is relevant here; that is, how much light is deflected OR absorbed. It doesn't matter how, just that it is. Lasers will encounter the same problem.


369 posted on 09/29/2004 2:04:37 AM PDT by ableChair
[ Post Reply | Private Reply | To 367 | View Replies ]


To: ableChair
If that were the case solar cells would be completely useless.

The sun radiates roughly 1380 watts per square meter above the atmosphere which is mostly visible light. Current commercial solar cells can produce 130 watts of electricity per square meter (direct sunshine, no clouds) on the ground which is 9.4% of the total energy the sun is radiating above the atmosphere. Current solar cells are only about 13% efficient... There is a huge discrepancy between this fact and your claims.

If the solar cell were 100% efficient and only 5% of the suns energy hit the ground you would get about 69 watts per square meter...

With a 13% efficient solar cell you'd get about 9 watts of electricity for every square meter of cells.

On top of that, solar cells don't convert long wave heat energy into electricity. Which is what would be predominant if the atmosphere absorbed 95% of the sun's radiation and then the atmosphere re-radiated that absorbed energy as heat.

Are you purposely debating this knowing otherwise just to get a response???

If so, I've unhappily wasted a large part of my day responding to you...

384 posted on 09/29/2004 2:35:30 AM PDT by DB (©)
[ Post Reply | Private Reply | To 369 | View Replies ]

Free Republic
Browse · Search
News/Activism
Topics · Post Article


FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson