10cm
Plane Mirror And Other Spherical Mirrors Bulged Outside, Such As Convex Mirrors
A virtual erect image of the same size of the object is formed.
40cm
1/object distance + 1/ image distance = 1/focal length
A concave mirror bulges away from the incident light. The image of an object depends on where exactly the object is placed - relative the to focal length of the mirror. See the attached link for more details.
if the focal length is greater than the object distance from the lens
if the focal length is greater than the object distance from the lens
A converging mirror will not produce a real image if the object is placed between the focal point and the mirror. In this case, the mirror will produce a virtual image on the same side as the object.
When an object is placed closer to a concave mirror than its focal length, the image formed is virtual, upright, and magnified. The image is located behind the mirror, and the rays of light appear to diverge from a point behind the mirror rather than converging at a real focal point.
The object must be located beyond the focal point of the mirror for a converging mirror to produce a real image.
When the object lies within its focal length then no real image can be produced
C: virtual, upright, and larger than the object
A converging mirror, such as a concave mirror, can produce real and inverted images for objects located beyond the focal point, or virtual and upright images for objects located between the focal point and the mirror. The size of the image can be larger or smaller than the object depending on its position relative to the mirror.
A concave mirror can give a virtual and larger image than the object when the object is placed within the focal length of the mirror. When the object is placed beyond the focal point, a real, inverted, smaller image is formed.
A. virtual, upright, and larger than the object.
A concave mirror forms a real or virtual image, depending on the object's distance from the mirror and the mirror's focal length.
The distance from a converging lens to the object is called the object distance. It is denoted by the symbol "u" and is measured along the principal axis of the lens. The object distance affects the size and location of the image formed by the lens.