Nội dung text 10 Light Reflection and Refraction 3.ppt
LIGHT - REFRACTION Refraction of Light Laws of Refraction Refractive Index Refraction through a Parallel Slab Refractive Indices of Different Media Principle of Reversibility of Light Refraction through a Compound Slab Apparent Depth of a Liquid Total Internal Reflection Refraction by Spherical Lenses Image Formation by a Convex Lens Image Formation by a Concave Lens New Cartesian Sign Conventions Lens Formula, Linear Magnification & Power of a Lens Created by C. Mani, Principal, K V No.1, AFS, Jalahalli West, Bangalore
Refraction of Light: Refraction is the phenomenon of change in the path (direction) of light as it travels from one transparent medium to another (when the ray of light is incident obliquely). It can also be defined as the phenomenon of change in speed of light from one transparent medium to another. Rarer Rarer Denser N N r i r i Laws of Refraction: I Law: The incident ray, the normal to the refracting surface at the point of incidence and the refracted ray all lie in the same plane. II Law: For a given pair of media and for light of a given wavelength, the ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant. (Snell’s Law) μ
i i r r A B C D N N AB – Incident wavefront CD – Refracted wavefront XY – Refracting surface E F G X Y c, μ1 v, μ2 Denser Rarer Bending of Light
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