the distance between a real object of magnification 1 formed by a concave mirror of focal length f is

Q. The distance of real object when a concave mirror produces a real image of magnification ${}^{\prime }{m}^{\prime }$ is ($f$ is focal length)

Q. The distance of ral object when a concave mirror producers a real image of magnification ${}^{\prime }{m}^{\prime }$ is ($f$ is focal lenght)

Q. When an object is at distance $u_1$ and $u_2$ from a concave mirror, real and virtual images are formed respectively having same magnification. The focal length of the concave mirror is

Q. An object is placed in front of a concave mirror of focal length $f$. A virtual image is formed with a magnification of 2. To obtain a real image of same magnification, the object has to moved by a distance

Q. The magnitude of focal length of a concave mirror is $f$. An object is placed at a distance $x$ from the focus and forms a real image. The magnification is: