It is the point , on the central axis, where light, that is parallel to the central axis, passes thru after it is reflected from the mirror. It is also at a distance from the mirror equal to twice the radius of curvature of the mirror.
Focal length, positive number with a concave mirror, negative for a convex mirror.
1/object distance + 1/ image distance = 1/focal length
yes
The focal length of a concave mirror is about equal to half of its radius of curvature.
I don't think so. The focal length would remain the same. It mainly depends on the radius of curvature of the mirror.
rough focal length of concave mirror
If an object's distance from the concave mirror is greater than the mirror's focal length, then the mirror image of it will be inverted. If the distance from the concave mirror is less than the focal length of the mirror, the image will not be inverted. No image will be produced if the distance from the mirror to the object is equal to the mirror's focal length.
Focal length, positive number with a concave mirror, negative for a convex mirror.
1/object distance + 1/ image distance = 1/focal length
15cm
yes
The focal length of a concave mirror is about equal to half of its radius of curvature.
Half of the radius
I don't think so. The focal length would remain the same. It mainly depends on the radius of curvature of the mirror.
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.
A2. A concave mirror is commonly used as a make-up mirror or a shaving mirror. For at close distances, (well inside it focal length) it gives a modest magnification. At distances greater than its focal length, it gives diminished images.
A concave mirror is a spherical mirror with a reflective inside surface. When the reflective surface is made more curved, the distance between the focal point and the surface increases. A concave mirror can form both virtual or real images.