Question

Diffraction occurs when radio path between Tx. And Rx. Is obstructed by ____________

(a) Surface having sharp irregularities

(b) Smooth irregularities

(c) Rough surface

(d) All types of surfaces

The question was asked in an interview.

My question is taken from Diffraction in chapter Mobile Radio Propagation: Large – Scale Path Loss of Wireless/Mobile

Answer 1

Right option is (a) Surface having sharp irregularities

Explanation: Diffraction occurs when radio path between transmitter and receiver is obstructed by a surface that has sharp irregularities (edges). The secondary waves resulting from the obstructing surface are present throughout the space and even behind the obstacle.