1) 1. Which of the following is the requirement for regular reflection of sound? a) (A) Smooth surface b) (B) Rough surface c) (C) Vacuum d) (D) Transparent rough surface 2) 2. What can you say about the planes in which the incident and reflected sound waves lie? a) (A) Perpendicular planes to each other b) (B) The same plane c) (C) Parallel planes to each other d) (D) Two different planes 3) 3.What is the measure of the angle made by the reflected sound with the reflecting surface when the angle of incidence is 30°? a) (A) 0° b) (B) 30° c) (C) 90° d) (D) 60° 4) 4. What is the primary aim of this experiment? a) A) To measure the speed of sound in the air. b) B) To study the transmission of sound waves. c) C) To observe the phenomenon of refraction of sound. d) D) To verify the laws of reflection of sound. 5) 5. In the procedure, what does the wooden plank placed along line AB function as? a) A) A screen to block the sound. b) B) The reflector for the sound waves. c) C) A source of sound. d) D) A normal line to the incident sound 6) 6. What specific property of sound are we listening for when adjusting tube T₂? a) A) The pitch of the sound. b) B) The speed of the sound. c) C) The loudest and clearest reflected sound. d) D) The frequency of the sound. 7) 7. What is the role of the two long, hollow tubes in the experiment? a) A) They increase the speed of sound. b) B) They act as a sound source and a reflector. c) C) They help in directing the incident and reflected sound waves accurately. d) D) They change the frequency of the clock's ticking sound. 8) 8. According to the conclusion stated in the provided text, what is the expected relationship between the angle of incidence (i) and the angle of reflection (r)? a) A) The angle of incidence is always greater than the angle of reflection. b) B) The angle of incidence is equal to the angle of reflection. c) C) The angle of incidence is half the angle of reflection. d) D) There is no relation between the two angles. 9) 9. What instrument is required to measure the angles of incidence and reflection? a) A) A ruler b) B) A weighing scale c) C) A protractor d) D) A stopwatch 10) 10. What can be inferred about the position of the incident ray, the reflected ray, and the normal based on this experiment setup a) A) They lie on different planes. b) B) They all lie in the same plane (the drawing paper). c) C) The reflected ray is always perpendicular to the normal. d) D) The incident ray is always parallel to the reflected ray.

JKC Experiment 10 Study of Reflection of Sound

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