Lab 9 | Physics homework help

LAB 9

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Reflection and Refraction Reflection and refraction are two commonly observed optical properties of light. Whenever light strikes the surface of some material at an angle, part of the wave is reflected, and part is transmitted (or absorbed). The reflection of light rays from a plane surface such as a glass plate or a plane mirror is described by the law of reflection: Law of reflection : θi = θr The angle of incidence (θi) is equal to the angle of reflection (θr). These angles are measured from a line perpendicular or normal to the reflecting surface. Refraction: represents a change of direction that light undergoes when it enters a medium with a different index of refraction from the one through which it has been traveling — for example, when, after moving through air, it passes through water. Law of Refraction: n1 sin 𝜃1 = n2 sin 𝜃2 n1 = index of first material 𝜃1 = angle of incidence n2 = index of second material 𝜃2 = angle of refraction Procedure The lab activity uses a simulation developed by the University of Colorado at Colorado Boulder. Refraction and Reflection Click here A.