Multiple choice Which of the following do(es) not employ the phenomenon of reflection of sound? Megaphone Stethoscope Two persons talking in a small room A theatre with curved ceiling Reveal answer Fill a bubble to check yourself C Correct answer Explanation The phenomenon of reflection of sound is involved in the use of megaphone, stethoscope used by doctors and in a theatre with curved ceiling. Two persons talking to each other in a small room do not employ reflection of sound.