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

With reference to sound waves, consider the following statements: 1. Sound waves do not need any medium and can travel in vacuum also. 2. Sound waves are longitudinal waves. 3. In sound wave propagat…

Consider the following statements about the microphone and the speaker of a mobile phone : 1. The microphone converts sound to a mechanical signal. 2. The microphone converts sound to an electrical s…

Which of the following statements is NOT correct regarding the travel of sound waves?

Two astronauts on the moon are standing 10 m apart. Astronaut A shouts toward Astronaut B and simultaneously flashes a light signal. Which of the following statements is correct?

Which one of the following statements about the speed of sound waves is not correct?