Question

While performing an experiment on verifying the laws of reflection of sound, a student is to choose between
(i) a narrow or a wide tube, and
(ii) a strong or a faint source of the sound.
The observed experimental difference, between the values of angle of incidence and angle of reflection, is likely to be minimum when he chooses a :
(1) narrow tube and a faint source
(2) wide tube and a faint source
(3) narrow tube and a strong source
(4) wide tube and a strong source

Answer 1

The observed experimental difference, between the values of angle of incidence and angle of reflection, is likely to be minimum when he chooses a narrow tube and a strong source. Because narrow tube allows the selected sound waves to travel clearly so that more distinct sound can be heard. Also, a strong source is always preferred over a faint source because the sound should be clear and audible to verify the laws of reflection of sound.

Hence, the correct answer is option 3.