![]() These concepts are illustrated in the animation below.įor more information on the ray nature of light, visit The Physics Classroom Tutorial. According to the law of reflection, the angle of incidence equals the angle of reflection. The angle of incidence is the angle between this normal line and the incident ray the angle of reflection is the angle between this normal line and the reflected ray. The refraction angle is now 90 degrees and the incident light can reflect on the medium if the angle of incidence is greater than the critical angle. The convention used to express the direction of a light ray is to indicate the angle which the light ray makes with a normal line drawn to the surface of the mirror. The incident ray of light is refracted in such a way that it passes down the waters surface at a given angle of incidence known as the critical angle. Reflection involves a change in direction of the light ray. When a ray of light strikes a plane mirror, the light ray reflects off the mirror. Measure the angles of the incidence and angle of reflection 5. Laws of reflection are also obeyed when light is reflected from the spherical or curved surfaces as shown in figure (a) and (b).Multimedia Studios » Ray Optics » The Law of Reflection.perpendicular to the surface) retraces its path as shown in figure. Thus, an incident ray normal to the surface (i.e. ![]() This means that when a ray of light strikes a surface and is reflected, the angle at which the ray strikes the surface (angle of incidence) is. the reflected ray is also perpendicular to the surface. My hypothesis was correct because the angle of incidence and the angle of reflection are related by the law of reflection, which states that the angle of incidence is equal to the angle of reflection. 1: The law of reflection states that the angle of reflection equals the angle of incidence r i. 1, which also shows how the angle of incidence and angle of reflection are measured relative to the perpendicular to the surface at the point where the light ray strikes. When a ray of light strikes a surface normally, then angle of incidence is zero i.e., ∠i = 0. The law of reflection is illustrated in Figure 1.3. (These two angles are labeled with the Greek letter 'theta' accompanied by a subscript read as 'theta-i' for angle of incidence and 'theta-r' for angle of reflection.) The law of reflection states that when a ray of light reflects off a surface, the angle of incidence is equal to the angle of reflection.
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