Real image


Real image

In optics, a real image is a representation of an actual object (source) formed by rays of light passing through the image. If a screen is placed in the plane of a real image the image will generally become visible. Examples of real images include the image seen on a cinema screen, the image produced on a detector in the rear of a camera, and the image produced on a human retina.

Real images can be produced by concave mirrors and converging lenses.

When we see through a lens, or look into a convex or concave mirror, what we see is "not" a real image. This, the image that we see on the other side of the lens or mirror plane, is known as a virtual image.

Real rays of light are always represented by full, solid lines.A real image occurs where rays converge, whereas a virtual image occurs where rays only "appear" to converge.

A real image is exemplified by a science toy/demonstration called "Mirage" which consists of two facing parabolic mirrors. One faces up, the other faces down one with a hole at its center. A real image of an object at the apex of the lower mirror appears just above the hole in the upper mirror. [http://www.grand-illusions.com/acatalog/Mirage.html]

ee also

*Virtual image
*Focal plane
*Image plane


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Look at other dictionaries:

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