Search results
It mainly depends on the distance between the object and the mirror. Concave mirrors form both real and virtual images. When the concave mirror is placed very close to the object, a virtual and magnified image is obtained, and if we increase the distance between the object and the mirror, the size of the image reduces and real images are formed.
- 13 min
Jul 7, 2020 · A concave mirror is a curved mirror that forms a part of a sphere and designed in such a way that rays of light falling on its shiny surface converge upon reflection. Hence, it is also called a converging mirror. A concave mirror produces both real and virtual images, which can be upright or inverted.
Jan 15, 2019 · This image that appears to be behind the mirror is called the image. The object is the source of the incident rays, and the image is formed by the reflected rays. An image formed by reflection may be real or virtual. A real image occurs when light rays actually intersect at the image, and is inverted, or upside down.
That is, is positive and , so that we may expect an image similar to the case 1 real image formed by a converging lens. Ray tracing in Figure 4 shows that the rays from a common point on the object all cross at a point on the same side of the mirror as the object. Thus a real image can be projected onto a screen placed at this location.
- Image Formation by Plane Mirror. The "object" could be any physical object or a source of light, but we often depict it as an upright arrow.
- Concave Mirror. The distance from the focal point to the mirror is called the focal length, f. We will not go into the details of the proof, but it can be shown using the small angle approximation that the focal length is equal to half the radius of curvature
- Principal Rays of a Concave Spherical Mirror. Using rays to determine the location, orientation, and the size of the image is known as ray tracing.
- Deriving Equations for a Concave Spherical Mirror. Since we are using the small angle approximation (we assume that all distances are close to the optical axis), the mirror can be approximated as flat where light is reflected, as shown by the bold vertical line.
While plane mirrors always produce virtual images, concave mirrors are capable of producing both real and virtual images. As shown above, real images are produced when the object is located a distance greater than one focal length from the mirror. A virtual image is formed if the object is located less than one focal length from the concave ...
(b) Makeup mirrors are perhaps the most common use of a concave mirror to produce a larger, upright image. A convex mirror is a diverging mirror (\(f\) is negative) and forms only one type of image. It is a case 3 image -- one that is upright and smaller than the object, just as for diverging lenses.
