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xdpeter

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Until 2001 the phenomenon of the negative refraction has been experimentally verified first by using artificial left-handed materials realized by periodic arrays of split ring resonators (SRRs) and wire strips .

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In the 1st paragraph of section 1 ¡°Until 2001 the phenomenon of the negative refraction has been experimentally verified¡± if you mean ¡°until 2001¡± (2001 is the ending point), then ¡°has been¡± has to be changed to ¡°had been¡±. If you mean ¡°since 2001¡± (2001 is the starting point) then there is no problem with ¡°has been¡±.

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[ Last edited by xdpeter on 2011-4-1 at 12:17 ]

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qjluo

½ð³æ (СÓÐÃûÆø)


xdpeter(½ð±Ò+3): 2011-04-01 13:20:14
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Not until in 2001 had the phenomenon of the negative refraction been experimentally verified firstly by using artificial left-handed materials realized by periodic arrays of split ring resonators (SRRs) and wire strips .
4Â¥2011-04-01 12:50:00
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
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luckygirl5605

ľ³æ (СÓÐÃûÆø)


xdpeter(½ð±Ò+4, ·­ÒëEPI+1): ¶àл£¬µÚÒ»¸ö»ØÌû£¬¶à·Öµã£¬ºÇºÇ 2011-04-01 13:19:58
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The phenomenon of the negative refraction has not been experimentally verified until 2001, first by using artificial left-handed materials realized by periodic arrays of split ring resonators (SRRs) and wire strips .
2Â¥2011-04-01 12:43:21
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

qjluo

½ð³æ (СÓÐÃûÆø)


xdpeter(½ð±Ò+3): 2011-04-01 13:20:08
In 2001 the phenomenon of the negative refraction

was

experimentally verified

firstly

by using artificial left-handed materials realized by periodic arrays of split ring resonators (SRRs) and wire strips .
3Â¥2011-04-01 12:45:52
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
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