Knowra Mirror Mirror A mirror is a reflective surface that forms an image of objects in front of it. Its image depends on the surface’s shape and the way it reflects light.
Specular reflection : Reflection from a smooth surface in which parallel incoming light rays remain parallel after reflection. Most mirrors form clear images because their surfaces produce orderly, specular reflection.
Light : Electromagnetic radiation detectable by the human eye, also described in many settings as photons or waves. Visible light carries the information that a mirror returns to the eye.
Rear-view mirror : A vehicle mirror that lets a driver see traffic behind or beside the vehicle. Its shape and placement balance field of view with useful image detail.
Diffusive reflection : Reflection from a rough surface that scatters light in many directions. Unlike a mirror, a diffusely reflecting surface generally does not form a sharp image.
Law of reflection : The rule that the angle of reflection equals the angle of incidence, measured from the surface normal. It determines the direction each ray takes when it bounces from a mirror.
Optics : The study of light’s behavior, including its propagation, reflection, refraction, and interaction with matter. Mirror behavior is a basic case of geometric optics.
Periscope : An optical instrument that lets an observer see over or around obstacles using mirrors or prisms. Its reflecting elements redirect light along a path that would otherwise be blocked.
Refraction : The change in a wave’s direction and speed as it passes between materials. Lenses form images mainly by refraction, rather than reflection.
Plane mirror : A flat mirror that produces an upright virtual image equal in size to its object. Its simple geometry gives the familiar image that appears behind a household mirror.
Virtual image : An image formed where light rays appear to originate, although they do not converge there. A plane mirror shows an image that appears behind the reflecting surface.
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