question_answer 55)

  For hearing the loudest ticking sound heard by the ear, find the angle x in the given figure.

Answer:

  We know that, in laws of reflection, the angle of incidence (x) is always equal to the angle of reflection (x), Since, AOB is a straight line.                       ( sum of all angles lies on the same side of aline is 180°)                                                                                 Hence, the value of x is.