Question

how can you experimentally locate the principal focus of a concave mirror?

Answer 1

Experimentally, we consider a distant object situated at a distance as an object at infinity. The rays coming from this object form a set of parallel rays.  

The parallel rays strike on the concave mirror and after suffering reflection they meet in the focal plane of the mirror at a point. This point is known as principal focus.

Answer 2

Answer:

Experimentally, we consider a distant object situated at a distance as an object at infinity. The rays coming from this object form a set of parallel rays.  

The parallel rays strike on the concave mirror and after suffering reflection they meet in the focal plane of the mirror at a point. This point is known as principal focus.

Explanation:

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