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10 Feb 2012 17:56:06 IST

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focal lenth

Physics

does focal lenth change in different medium and why

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Kumar Kaustub Priyadarshi

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10 Feb 2012 18:30:38 IST

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actually the focal length is not exactly some distance related to any refracting medium. it is the point where both the light rays(considering two) seems to have same speed,phase or the over lapping wave front, that is what the two intersecting lines represents. so from here we can visualise that the iternal property of of light depend upon ray permittivity of a certain medium.

and as we know tht this permitivity often called refraction constant or refractive index, vary from one to another. so the focaL LENGTH CHANGES FROM MEDIUM TO MEDIUM

shivansh shrivastava

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10 Feb 2012 21:01:31 IST

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1/f=n2/v - n1/u (1/r1 - 1/r2)

shivansh shrivastava

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10 Feb 2012 23:24:51 IST

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Sry,put n1,whr it is v and u

nageen

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11 Feb 2012 11:14:59 IST

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wil the focal length of convex or concave mirror change with change of medium??

shivansh shrivastava

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11 Feb 2012 12:53:46 IST

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