Angular field of viewconverter

A kid of height 1.1ft is sleeping straight between focus and centre of curvature along the principal axis of a concave mirror of small aperture. His head is towards the mirror and is 0.5ft from the focus of the mirror. How a plane mirror should be placed so that the image formed by it due to reflected light from concave mirror looks like a person of height 5.5ft standing vertically. Draw the ray diagram. Find the focal length of the concave mirror.

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Angular field of viewcalculator

A spherical mirror in which reflecting surface is towards the centre of the sphere of which the mirror is a part, is called concave mirror, i.e., reflection of light for this mirror occurs at concave surface or bent-in surface. The rays of light incident on concave mirror in a direction parallel to the principal axis, actually meet at a single point F on the principal axis of the mirror. This point is called principal focus of the mirror. Read the above passage and answer the following questions : (i) Is principal focus of a concave mirror, a real point or a virtual point? (ii) What happens in case of a convex mirror ? (iii) Our teachers and parents advise us to stay focussed. What does it imply?