yes
Focal length, positive number with a concave mirror, negative for a convex mirror.
1/object distance + 1/ image distance = 1/focal length
The focal length of a concave mirror is about equal to half of its radius of curvature.
The objects size is not going to change. The image size, however, would.
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
The focal length of a concave mirror is a function of its radius only (a geometry function), not of its material nor the material surrounding it. To change the focal length you wound have to alter it physically. Keep in mind that the light or whatever is being focused does not make a media change. It never enters the mirror media. It is always in the surround media, whatever that is, so Snell's law does not apply here.
The focal length of a concave mirror is about equal to half of its radius of curvature.
The objects size is not going to change. The image size, however, would.
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.
Nothing. The focal length is defined as point where all of the light converges after passing through the lens ( for a convex mirror)and only depends on the mirror's curvature. So changing the incident light ray will cause no change in the focal length of the mirror.