In concave mirror, principal focus is

If any object is placed at the centre of curvature of a concave mirror, then its image is formed at _____.

If any object is placed beyond centre of curvature of a concave mirror, the position of image will be:

If we focus the concave mirror to reflect sunlight towards a point at a distance $‘\mathrm{x}’$, skin burn is sensed. The distance $\mathrm{x}$ is equal to _____.

If a concave mirror is dipped in water then its focal length will__

Condition When concave mirror can form an image larger than the actual object is__

While doing experiments with candle to find focal length of a concave mirror, the candle is placed

A full length image of a distant tall building can definitely be seen by using

The centre of the sphere of which the spherical mirror forms a part is called