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5 bytes removed
, 06:53, 2 June 2015
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| ==optics== | | ==optics== |
− | **nature of light** | + | **nature of light |
− | ##dual nature 1.1
| + | **dual nature |
| ## example 1.1.a | | ## example 1.1.a |
| ## example 1.1.b | | ## example 1.1.b |