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A concave mirror is a curved mirror that
is bended inward.
They reflect light to one focal point, therefore they are used to focus light .
These mirrors are called “converging mirrors” because they collect light that falls on them, refocusing the parallel rays towards a focus.
From a distance, images appear upside down but when brought
nearer, image become larger in size and appears right side up .
They are commonly found in the head lights of vehicles making the light more reflective and wider, making it possible for the drivers to have a better view at
night.
Telescopes use a set of curved mirrors to collect and focus light to increase the size of an
object being viewed.
Concave mirrors are also widely used in the
field of science
particularly in microscopes.
This type of mirrors is also used by
dentists to have a bigger image of the teeth that
they are attending to.
This is also used in barber shops where barbers used it to have
an enlarged image of the
face.
Even solar powered objects are using concave mirrors to concentrate the
heat in a single direction.
When the Object is Placed beyond CA ray parallel to the principal axis. The ray passing through the center of curvature retraces its path and the ray which is parallel to the principal axis passes through the focus after reflection. These rays after reflection
meet at a point between C and F .The image is
-Between C and F-Real-Inverted-Diminished
When the Object is Placed at CHere we consider the two rays, one parallel to the principal axis and the other passing through the focus. The ray of light which is parallel to the principal axis passes through the focus after reflection. The other ray passing through the focus after reflection emerges parallel to the axis. After reflection these rays meet at the center of curvature to form an inverted image, which is real and of the same size as the object.
The image is-At C-Real-Inverted-Same size as object
When the Object is between C and F:Here we consider a ray of light which is parallel to the principal axis and another ray passing through the focus. The ray which is parallel to the principal axis passes through the principal focus and the ray which passes through the focus after reflection emerges parallel to the principal axis. The reflected rays meet at a point beyond C.
The image is-Beyond C-Real-Inverted-Magnified
When the Object is at F:Here, we consider a ray of light which is parallel to the principal axis and another ray passing through the center of curvature. The ray which is parallel to the principal axis passes through the focus and the ray which passes through the center of curvature retraces its path. The reflected rays are parallel to each other, and would meet only at infinity.The image is-At infinity-Real-Inverted-Magnified
When the Object is in front of F:Here we consider a ray of light which is parallel to the incident ray and another ray which is passing through the center of curvature. The ray which is passing through the center of curvature retraces its path and the other ray which is parallel to the principal axis after reflection passes through the focus. These rays appear to meet behind the mirror
when the reflected rays are extended backwards .The image is
-virtual -erect
-magnified
