what type of mirror is used whenever a magnified image of an onject is needed?
concave or convex and why?
Whenever a magnified image of an object is needed, a concave mirror is typically used.
A concave mirror is a mirror with a reflective surface that curves inward. This type of mirror is curved in a way that the center part is deeper or more recessed than the edges. When light rays from an object pass through a concave mirror, they converge or come together. This convergence of light rays allows a concave mirror to form magnified images.
To understand why a concave mirror is used for magnification, we can look at the characteristics of its reflection. When an object is placed in front of a concave mirror beyond its focal point (the point where the light rays converge), the reflected rays of light will diverge. However, these diverging rays can be traced backward to locate the virtual image formed by the mirror. This virtual image is what we perceive as the magnified image of the object.
Conversely, a convex mirror is a mirror with a reflective surface that curves outward. When light rays pass through a convex mirror, they diverge or spread out. As a result, convex mirrors are used to create a wider field of view and a smaller, diminished image of an object.
So, in summary, a concave mirror is used when a magnified image of an object is needed because it converges and focuses the light rays, forming a virtual, magnified image of the object.