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class-8-maths-direct-and-inverse- proportions

on December 17, 2022

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class-8-maths-direct-and-inverse- proportions

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Refraction of light Plane surface

Notes on Refraction of Light Refraction of Light Plane Surface Refraction of Light: Refraction is the bending of light when it passes from one medium to another with a different refractive index. Refractive Index: Refractive index (n) of a medium is the ratio of the speed of light in a vacuum to the speed of light in that medium. It is given by: n = c / v where c is the speed of light in a vacuum and v is the speed of light in the medium. Relative Refractive Index: Relative refractive index (n₂/n1) is the ratio of the refractive indices of two different media (n₂ and n1). Relative Refractive Index = n₂ / n1 Critical Angle: The critical angle (θc) is the angle of incidence in a denser medium at which the angle of refraction in a rarer medium is 90 degrees. It is given by: θc = sin^-1(n2 / n1) Total Internal Reflection (TIR): Total Internal Reflection occurs when the angle of incidence is greater than the critical angle, and all ...

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