Reflection Of Sound

Which of the following device does not work on reflections of sound waves?

Draw a labelled diagram to show the multiple reflections of sound in a part of the stethoscope tube.

While doing experiment on verifying the laws of reflection of sound, four students measured the angle lt I and lt r . The correct measurement of the angles of incidence and angle of reflections has been done by student :

While performing an experiment on verifying the laws of reflection of sound, a students is to choose between (i) a narrow or a wide tube, and (ii) is strong or a faint source of 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:

{:(,"Column A",,, "Column B"),(A., "Frequency", (), a., "Detect flaws inside a metal"),(B., "The loudness of sound", ( ), b., "Ghatam"),(C., "The angle of incidence", ( ), c., "Equal to the angle of reflection of sound"),(D., "Ultrasounds", ( ), d., "Amplitude"),(E., "Ghana vadya", (), e., "Ratio of the number of oscillations to the time taken"):}

A car travelling towards a hill at 10 m//s sound its horn which a frequency 500 H_(Z) . This is heard in a second car travelling behind the first car in the same direction with speed 20 m//s . The sound can also be heard in the second car by reflections of sound the hill. The beat frequency heard by the driver of the sound car will be (speed of sound in air = 340 m//s)

Beats |Doppler Effect |Doppler Effect In Reflected Sound

Beats |Doppler Effect |Doppler Effect In Reflected Sound

Beats |Doppler Effect |Doppler Effect In Reflected Sound