Question

The intensity at a point at a distance r from a source which produces cylindrical wavefront varies as

Answer 1

Answer:

Explanation:

The inverse-square law, in physics, is any physical law stating that a specified physical quantity or intensity is inversely proportional to the square of the distance from the source of that physical quantity. The fundamental cause for this can be understood as geometric dilution corresponding to point-source radiation into three-dimensional space (see diagram)