Plane Mirror PDF

PLANE MIRROR REFLECTION OF LIGHT Two types: 1) Specular/ Regular reflection – as light is reflected from a smooth surface at a definite angle. 2) Diffused/ Irregular reflection – produced by rough surfaces that tend to reflect light in all directions. REFLECTION OF LIGHT The laws...

PLANE MIRROR REFLECTION OF LIGHT Two types: 1) Specular/ Regular reflection – as light is reflected from a smooth surface at a definite angle. 2) Diffused/ Irregular reflection – produced by rough surfaces that tend to reflect light in all directions. REFLECTION OF LIGHT The laws of reflection state that: 1. the incident ray, the reflected ray, and the normal line to the reflecting surface all lie in the same plane; and 2. the angle of incidence is equal to the angle of reflection.  REFLECTION OF A LIGHT RAY ON A PLANE MIRROR the ray of light coming the ray of from the light light which source leaves the towards a mirror surface the angle the angle between between the the reflected ray and incident ray normal line and normal line IMAGE FORMATION IN PLANE MIRROR Mirror is any reflective surface usually coated from behind with thin aluminum or silver nitrate that allows light to bounce off, this property of light enables to form an image is called “reflection”. An image is a copy of an object that is formed by reflection of light in mirrors. Mirrors may have flat or curved surfaces. The shape of a mirror’s surface determines the type of image it forms. REFLECTION IN PLANE MIRROR When light hits an object, every part of that object reflects light in all direction. Some of the reflected light reaches our eyes. Thus, we can see an object. Characteristics of images formed by a plane mirror: 1. Image is virtual; 2. Same size as the object; 3. Same orientation as the object; and 4. Same distance from the mirror as the object QUALITATIVE CHARACTERISTICS OF IMAGE FORMED IN MIRRORS A REAL image forms in front of a A VIRTUAL image image mirror where reflected light rays appears to be on the other actually meet. It is a true image side of the mirror. Of that could be projected onto a course, reflected rays don’t screen. Examples of real images actually go through the include an image on a cinema mirror to the other side, so screen, the image produced by a a virtual image doesn’t camera on the photographic film really exist. It just appears and the image formed on eyeball to exist to the human retina. brain. QUALITATIVE CHARACTERISTICS OF IMAGE FORMED IN MIRRORS It is formed by the actual No light actually passes at intersection of light rays after the apparent location of the hitting the mirror’s surface. A image. A VIRTUAL image is REAL image is formed in front of formed behind the mirror. the mirror. It can be projected onto the It cannot be focused on a screen, and it is always screen, and it is always INVERTED. inverted.