The distance of an object from the pole of a concave mirror is equal to its radius of curvature. The image must be:

$A$ short object of length $L$ is placed along the principal axis of a concave mirror away from focus. The object distance is $u$. If the mirror has a focal length $f,$ what will be the length of the image? You may take $L << |u-f|$.

The distance between an object and its image (magnified by $-\frac{1}{3}$) is $30 \ cm$. The focal length of the mirror used is $\left(\frac{x}{4}\right) \ cm$,where the magnitude of the value of $x$ is . . . . . . .

As the position of an object $(u)$ reflected from a concave mirror is varied,the position of the image $(v)$ also varies. By letting the $u$ change from $0$ to $+\infty$,the graph between $v$ versus $u$ will be:

The primary purpose of using a parabolic mirror in a reflecting telescope is

If a parallel beam of light is incident on spherical mirrors, then after reflection, they pass through the focal point. If $F$ is the focal length and $R$ is the radius of curvature of the mirror, then: