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CBSE Class 10 Answered

regarding speed of light
Asked by | 03 Apr, 2008, 04:13: PM
answered-by-expert Expert Answer

In the case of an electromagnetic wave, the speed of the wave depends upon the optical density of that material.  The optical density of a material relates to the sluggish tendency of the atoms of a material to maintain the absorbed energy of an electromagnetic wave in the form of vibrating electrons before reemitting it as a new electromagnetic disturbance. The more optically dense which a material is, the slower that a wave will move through the material.

      optical density = 3 x 108/ vmaterial

Answered by | 22 May, 2008, 04:44: PM
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