![]() ![]() A mirror has a smooth surface (compared with the wavelength of light) and so reflects light at specific angles. Light strikes different parts of a rough surface at different angles and is reflected, or diffused, in many different directions. Note: The laws of reflection are the fundamental principle behind the solution to this question, it states that when a ray of light reflects a smooth surface, the angle of incidence is always equal to the angle of reflection, and another law behind this rule is that at the point of incidence, the incident ray, the reflected ray and the normal ray all lie in the same plane. The angle of reflection equals the angle of incidence. They may appear unequal when the surface from which light reflects is unequal, yet the law holds valid when examined at extremely small surface areas. According to Fermat’s principle of least time, it is therefore the preferred path for the light ray. The law of reflection says that the angle of incidence is equal to the angle of reflection. However, according to the first law of reflection, Angle of incidence equals angle of reflection at a small surface area. 6 shows that at this distance (x 7.0 cm), the angle of incidence is equal to the angle of reflection, providing convincing evidence that the light ray travels the least distance and hence the least time. The law of reflection is a basic physical law that explains all kinds of reflection. $x_i \neq x_r$, where $x_i$ is angle of incidence and $x_r$ is angle of reflection. if the surface has some irregularities) then the angle of incidence is not equal to the angle of reflection. ![]() $\theta_i = \theta_r$, where $\theta_i$ is angle of incidence and $\theta_r$ is angle of reflection. As we know according to the law of reflection angle of incidence is equal to angle of reflection this is true if and only if, if the surface on which light strikes is smooth. When light is reflected from a surface, the angle of incidence is always equal to the angle of reflection, where both angles are measured from the path of the. The law of reflection states: The angle of reflection, r r, equals the angle of incidence, i i. ![]()
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