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jameshust

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2Â¥2009-09-08 09:51:55
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TT5310

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Originally posted by jameshust at 2009-9-8 09:51:
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3Â¥2009-09-08 10:10:08
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4Â¥2009-09-08 10:38:54
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yzcluster

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TT5310(½ð±Ò+1):лл²ÎÓë
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Originally posted by TT5310 at 2009-9-8 10:10:

¶÷£¬ÄÇÏàͬÎïÖÊ£¬²»Í¬µÄ²¨³¤ÓÐûÓиö´óÔ¼µÄÀàËÆ¾­Ñ鹫ʽÀàµÄ£¬±ÈÈçÊDz»Êdz¤²¨³¤µÄ¹â³Ì¸ü´óÖ®ÀàµÄ

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5Â¥2009-09-08 11:13:00
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bote

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TT5310(½ð±Ò+1):лл²ÎÓë
it depends on the optical absorption coefficient of a material.
suppose that the refraction index of a material is:
       n=x+iu                   (complex number)
and the light speed in this material is:
       v=c/n                     c: light speed
you can get light intensity in this material:
       I=I0*exp(-a*y)       I0: incident light intensity  I: light intensity at position y inside the material, with:
       a=4*pi*u/lambda    a:absorption coefficient
generally, when y=a, the y is called the penetration depth of the light for this material

it is the quantity you ask for

[ Last edited by bote on 2009-9-8 at 11:36 ]
6Â¥2009-09-08 11:31:53
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cosine

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7Â¥2009-09-08 21:56:37
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arisun8818

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Originally posted by jameshust at 2009-9-8 09:51:
Õâ¸öºÃÏñûÓй̶¨µÄ¹«Ê½£¬Ïàͬ²¨³¤²»Í¬ÎïÖʲ»Ò»Ñù£¬Í¬ÎïÖÊ£¬²»Í¬²¨³¤ÓÖ²»Ò»Ñù£¬Ò»°ãÊÇͨ¹ýʵÑé²â¶¨µÄ

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8Â¥2009-09-08 22:46:16
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arisun8818

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ÒýÓûØÌû:
Originally posted by yzcluster at 2009-9-8 11:13:


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9Â¥2009-09-08 22:46:38
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kisfire

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