ध्वनि तरंगें निम्नलिखित में से किस माध्यम में सबसे तीव्र गति से यात्रा करती हैं?

Consider the following statements regarding waves: 1. If the particles of a medium move along the direction of propagation of the wave, the wave is called a longitudinal wave. 2. If the particles of a medium vibrate perpendicular to the direction of propagation of the wave, the wave is called a transverse wave. 3. Transverse waves involve changes in the shape/shear of the medium, whereas longitudinal waves involve changes in the density/volume of the medium. Which of the statements given above are correct?

At what speed should a source of sound move away from a stationary observer so that the observer perceives the apparent frequency to be half of the original frequency? (where v is the speed of sound)

A closed organ pipe and an open organ pipe are tuned to the same fundamental frequency. What is the ratio of their lengths?

Which principle of physics is primarily utilized in Doppler ultrasonography (medical diagnostic imaging) to evaluate blood flow?

In which type of wave do the particles of the medium vibrate parallel to the direction of wave propagation?

Which of the following types of mechanical waves can propagate through gases?

Which of the following scenarios specifically illustrates the Doppler effect for sound waves?

The distance between two consecutive crests or troughs in a wave is called: