The plane mirror always forms a real image of the object.The position of the image beyond the mirror is the same as that of the object in front.The image formed is exactly of the same size as the object.In a similar way, the angle of reflection is the angle between the reflected ray and the normal at the point of incidence.Ĭharacteristics of image formed by plane mirror: The angle of the incidence refers to the angle between the incident ray and the surface normal (an imaginary line perpendicular drawn to the surface). The light rays when striking a plane mirror, the angle of reflection equals the angle of incidence always. The incident ray at the surface of the polished surface, the reflected ray, and the normal which is at the point of incidence, all lie in the same plane.Ī plane mirror refers to a mirror with a flat (planar) reflective surface.The Angle of incidence ∠i is always equal to the angle of reflection ∠r (∠i =∠r).The angle of reflection ∠r refers to the angle between the reflected rays with the normal. The angle of incidence ∠i refers to the angle between the incident rays with the normal.An imaginary line that is perpendicular to the reflecting surface from where the reflection occurs is known as the normal.The ray of light that falls on a reflecting surface is known as the incident ray and the ray that is reflected back is known as the reflected ray.The path of the reflected ray will depend upon the extent of smoothness of the surface, in the case of smooth surface the reflected ray emerges with the same angle as of incidence and in the latter case suffers irregular reflection and so the reflected ray doesn’t emerge same as that of incidence angle. This can be observed on any surface which is rough or smooth. The phenomenon of reflection doesn’t change the velocity of light it only reverses the direction of light incident on it. The light after reflection travels in the same medium from where the ray was incident on the surface. The observation of light bouncing off the surfaces is termed as reflection. Any surface which is polished or in other words is shiny always acts like a mirror. The light gets reflected from the surfaces. The amount of light that enters our eyes is regulated by the pupil of our eyes in which iris muscles play an important role in broadening the size of the pupil in a dark room so that more light can enter, and we can see properly and on the other hand decrease the size of the pupil when in a highly lighted room so that our eyes are protected from the over entrance of light. The things which don’t reflect light are very hard to identify when we are in dark. It is because of this nature that we can perceive a better image of the object when viewed at a correct angle. Whenever light from any source is reflected it follows some laws which are listed below. Some of the examples are trees, soil, grass, shoe, pencil, scale, etc. Our eyes cannot see those objects clearly as the light from their surface is not reflected in our eyes. On the contrary, there are some objects which do not emit light of their own and so are termed as non-luminous objects. Some emit light of their own and some by the use of electricity or any other thing.
Some examples include the sun, matchstick, light lamp, stars, etc. Some objects are luminous that is they have a light of their own or somehow can produce light, and so they enable us to see them clearly. The light from a source falls on the object and then bounces off onto our eyes from its surface and that is how we perceive it. Our eyes alone cannot allow us to see the object. The word refers to the visible light, which is visible to the human eye and is responsible for the sense of sight of the object. Light is that energy source that enables us to see. Earthquake - Definition, Causes, Effects, Protection.
0 kommentar(er)
