The convex mirror diverges light rays, so if you draw the reflected rays in front of the mirror and continue drawing them at the back of the mirror the virtual light rays (at the back of the mirror) will join. This point is called a Virtual Focus Point.
A convex lens converges light to a point of focus.
A concave lens diverges the light so the focal point is virtual, the light is defocused or spread out further
because in a convex lens rays join at a common point after refrection but in case of a concave lens they appears to come from a common point.
the focal point of a concave mirror is positive while a convex is negative
A convex mirror bulges out. A concave mirror curves inward.For a convex mirror, light rays are reflected to meet at a point, while, for a concave mirror, light rays seem to be reflected from a point. If the incident rays were paraxial, the reflected rays are reflected to meet at, or appear to be reflected to a point referred to as the focal point of the lens. For a convex mirror, the focal point is real, while, that of a concave lens is virtual.
a convex lens
mirrorsconcave (converging) -->)-virtual: enlarged upright image when DoDo>F-real: same size inverted image when Do=C-real: diminished (smaller) inverted image when Do>Cconvex (diverging) -->(-virtual: diminished when Do is anywhereplane (flat) -->l-same size virtualmeanings of lingoDi is distance of image from mirrorDo is distance of object mirrorC is center of curvatureF is focal point "this is between the center of curvature and mirror
because in a convex lens rays join at a common point after refrection but in case of a concave lens they appears to come from a common point.
because in a convex lens rays join at a common point after refrection but in case of a concave lens they appears to come from a common point.
Convex lens produces both real and virtual images. But concave lens produces only virtual images for real objects. If object is virtual then real image could be produced by a concave lens.
the focal point of a concave mirror is positive while a convex is negative
A convex mirror bulges out. A concave mirror curves inward.For a convex mirror, light rays are reflected to meet at a point, while, for a concave mirror, light rays seem to be reflected from a point. If the incident rays were paraxial, the reflected rays are reflected to meet at, or appear to be reflected to a point referred to as the focal point of the lens. For a convex mirror, the focal point is real, while, that of a concave lens is virtual.
a convex lens
The focal point F and focal length f of a positive (convex) lens, a negative (concave) lens, a concave mirror, and a convex mirror. The focal length of an optical system is a measure of how strongly the system converges or diverges light.
Concave. With myopia, the focal point of the eye is in front of the retina. Concave lenses increase the distance of the focal point so that it lies on the surface of the retina.
mirrorsconcave (converging) -->)-virtual: enlarged upright image when DoDo>F-real: same size inverted image when Do=C-real: diminished (smaller) inverted image when Do>Cconvex (diverging) -->(-virtual: diminished when Do is anywhereplane (flat) -->l-same size virtualmeanings of lingoDi is distance of image from mirrorDo is distance of object mirrorC is center of curvatureF is focal point "this is between the center of curvature and mirror
Focal length, positive number with a concave mirror, negative for a convex mirror.
There are two types of lenses - fixed focal and zoom lenses.
A concave lens and a convex lens are what you're looking for. / | ∙ \