![]() ![]() What happens a ray of light falls normally (or perpendicularly) on the surface of a mirror? The laws of reflection of light apply to all kinds of mirrors, plane mirrors as well as spherical mirrors.Ī ray of light which is incident normally on a reflecting surface (say a mirror), is reflected back along the same path because the angle of incidence as well as the angle of reflection for such a ray of light are zero. In the given figure, the angle ∠ NOB is the angle of reflection, and it is denoted by the letter r.According to the first law of reflection, the incident ray, the reflected ray and the normal at the point of incidence all lie in the same plane which is perpendicular to the plane of the reflecting surface.Īccording to the second law of reflection, the angle of incidence is always equal to the angle of reflection for small angles. (f) Angle of reflection: The angle of reflection is the angle made by the reflected ray with the normal at the point of incidence. A ray of light strikes a surface at a specific point. ![]() When a ray of light falls upon the surface of a mirror, it reflects in return. In the given figure, the angle ∠ AON is the angle of incidence, and it is denoted by the letter i. In Physics, the angle of incidence can be depicted as the angle formed in between a ray propagated on a surface and the line normal to the point of occurrence on the same surface. (e) Angle of incidence: The angle of incidence is the angle made by the incident ray with the normal at the point of incidence. The angle of reflection is equal to the angle of incidence. In the given figure, OB is the reflected ray of light. As the ray of light moves from water (incident ray) to air (refracted ray) it is possible to see in the image above that the ray of light is bent at an angle. An incident ray of light hits a plane mirror at an angle and is reflected back off it. ![]() (d) Reflected ray: The ray of light which is sent back by the mirror is called the reflected ray. In the given figure, the line ON is the normal to the mirror surface at point O. The angle between the incident ray and the normal is equal to the angle between the reflected ray and the normal. Angle of reflection: The angle which the reflected ray makes with the normal at the point of incidence is called the angle of reflection. Explore more such questions and answers at BYJU’S. A light ray incident upon a reflective surface will be reflected at an angle equal to the incident angle. (c) Normal: The normal is a line at the right angle to the mirror surface at the point of incidence. The angle of reflection is defined as an angle between the reflected ray and the normal at the point of incidence to a reflecting surface. In the given figure, point O on the surface of the mirror is the point of incidence. (b) Point of incidence: The point at which the incident ray falls on the mirror is called the point of incidence. In the given figure above, AO is the incident ray of light. (a) Incident ray: The ray of light that falls on the mirror is called the incident ray. The process of sending back light rays that fall on the surface of an object is called reflection of light. Angle of reflection - The angle between reflected ray and the normal at the point of incidence to a reflecting surface is known as angle of reflection. ![]()
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