Intensity of image decreased
Imagine if you cut a mirror shaped like a ball in half. The inside half is the concave mirror, and the outside half is a convex mirror.
Half of the radius
It wil come forth he who has understanding
there is an imaginary point in front of the concave mirror, called the focal point or focus, which is half the length of the radius of the sphere of which the mirror was a part of(radius of curvature). usually an object if seen in between the mirror and focus gets magnified, beyond the focus, it gets inverted and reduced.
There are some meaning on the term " concave up". However, in most cases, a concave is a hallow curve. A half circle with an opening is also a concave. Concave up means to concave somethings.
Imagine if you cut a mirror shaped like a ball in half. The inside half is the concave mirror, and the outside half is a convex mirror.
Half of the radius
It wil come forth he who has understanding
there is an imaginary point in front of the concave mirror, called the focal point or focus, which is half the length of the radius of the sphere of which the mirror was a part of(radius of curvature). usually an object if seen in between the mirror and focus gets magnified, beyond the focus, it gets inverted and reduced.
The focal length of a concave mirror is about equal to half of its radius of curvature.
There are some meaning on the term " concave up". However, in most cases, a concave is a hallow curve. A half circle with an opening is also a concave. Concave up means to concave somethings.
mirror
A Half Round Bastard File is a tool designed for use on concave, convex and flat surfaces.
As shown in the figure, a paraxial ray is incident at point Q on a concave mirror. q = angle of incidence = angle of reflection = Ð CQF = Ð QCF ( by geometry ) So, for D CFQ, exterior Ð QFP = Ð CQF + Ð QCF = 2q . For paraxial incident ray and small aperture, CP' » CP = R and FP' » FP = f. For small aperture, 2q is very small. \ from the figure, 2q » FP QP = f QP … ( 1 ) and q = CP QP = R QP … ( 2 ) From equations ( 1 ) and ( 2 ), R = 2f ⇒ f = R / 2 Thus, focal length of a concave mirror is half its radius of curvature.
Cut the mirror in half down the middle :p
You look in the mirror to see what you saw. Grab the saw cut the table in half. two half make a whole. Jump out the hole.
In the 2012 film "Mirror Mirror" the names of the seven dwarfs are Grimm , Butcher , Wolf , Napoleon , Half-Pint , Grub and Chuckles .