Question

Assertion: a full length image of a tall building can be been by using convex mirror.
Reason: laws of reflection hold good for all Mirrors irrespective of their shape.
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Answer 1

Answer:

Both assertion and reason are true, but reason is not the correct explanation of assertion.

Explanation:

The surface of a curved mirror can be convex, which means bulging outward, or concave, bulging inward. A convex mirror is a  a curved mirror, in which the reflective surface bulges outside, that is towards the light source.

This mirror forms a virtual and diminished image irrespective of position of the object. Thus, a full length image of a tall building can be seen by using a convex mirror.  Whereas a concave mirror reflects the light outwards and is used to focus light.