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how to find the speed of light in a medium. If a light ray propagates from a medium 1 of refractive index 2 255 to a medium 2 of refractive index Z 155 find the critical angle in degree minutes and. When scientists talk about the speed of light 299792458 ms we implicitly mean the speed of light in a vacuum Only in the absence of particles fields or a medium to travel.
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Speed of light in a medium is Z 2 108 ms. For years scientists struggled to find an explanation for why sound waves and water waves moved at a speed relative to the medium they were traveling through but light waves did not seem to behave in the same way. Is the speed of light in medium 1 and medium 2 respectively.
Critical Angle for light moving from medium I to medium 2 is th.
Your reading introduced you to the concept of index of refraction n defined by n c v where c 299792458 x 10 8 ms. Calculate the index of refraction for a medium in which the speed of light is 546 10 7 ms. Therefore it can be understood that for a medium of higher refractive index the speed of light in that medium will be slower. An electromagnetic wave ie a light wave is produced by a vibrating electric charge.
