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当光从光密介质(optically denser medium)射向光疏介质(optically rarer medium)时,会发生折射现象,但也会发生少许的反射,这也是折射出来的光的亮度较弱的原因。但入射角(incident angle)大于临界角(critical angle)时,就不会再发生折射了,只会发生反射,俗称全反射(total internal refection)但。是当光从光疏介质射向光密介质时,虽然我知道是不会发生全反射,也没有临界角,但是它会不会像刚才那样,发生折射时也发生少许反射呢?
[ 本帖最后由 kenny56 于 30-3-2007 11:21 PM 编辑 ] |
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发表于 13-3-2007 06:00 PM
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发表于 16-4-2007 11:30 PM
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Yes, it will. Reflection always occurs regardless of whether the medium is lossless or lossy except at the incident angle of Brewster angle, where reflection coefficients equal zero and total transmission occurs.
For any interface between two media (can be lossless or lossy), Brewster angle always exists. |
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