A parabolic reflector (also known as a parabolic dish or a parabolic mirror) is a reflective device formed in the shape of a paraboloid of revolution. Parabolic reflectors can either collect or distribute energy such as light, sound, or radio waves.
The parabolic reflector functions due to the geometric properties of the paraboloid shape: if the angle of incidence to the inner surface of the collector equals the angle of reflection, then any incoming ray that is parallel to the axis of the dish will be reflected to a central point, or "focus". Because many types of energy can be reflected in this way, parabolic reflectors can be used to collect and concentrate energy entering the relector at a particular angle. Similarly, energy radiating from the "focus" to the dish can be transmitted outward in a beam that is parallel to the axis of the dish.
Parabolic reflectors suffer from an aberration called coma. This is only of interest in telescopes because other applications don't require sharp resolution off the axis of the parabola.
A parabolic reflector (also known as a parabolic dish or a parabolicmirror) is a reflective device, formed in the shape of a paraboloid of revolution.
The parabolic reflector functions due to the geometric properties of the paraboloid shape: if the angle of incidence to the inner surface of the collector equals the angle of reflection, then any incoming ray that is parallel to the axis of the dish will be reflected to a central point, or "focus".
A mirage bowl or parabolicmirror wok is a toy consisting of two parabolicmirrors that are put together like a wok pan and a lid with a hole in it, gives the optical illusion that something is on the lid, but actually it is at the bottom of the pan below.
The beam's angle of inclination from the mirror is
The most well-known instance of the parabola in the history of physics is the trajectory of a particle or body in motion under the influence of a uniform gravitational field without air resistance (for instance, a baseball flying through the air, neglecting air friction).
The most well-known instance is the parabolic reflector, which is a mirror or similar reflective device that concentrates light or other forms of electromagnetic radiation to a common focal point.
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