Tag: physics

Transverse waves cannot propagate in gases because there are no forces to cause motion perpendicular to the direction of the wave. A transverse wave propagates in a solid because each atom of the solid has an "equilibrium location" where the forces on it from all its neighboring atoms balance. If one atom is pulled out of its equilibrium location by a disturbance, it will tend to be pulled back to that location. However, when it's out of its equilibrium location, it pulls its neighbors out of their equilibrium locations too, and so on down the line. The result is that a transverse wave disturbance propagates through the material.

A transverse wave travels through a medium in the form of crests and troughs.

• MEDIUM SHOULD BE ISOTROPIC: The properties of the medium should be the same in all directions.
  
• ELASTICITY : The medium should have elasticity so that the particles return back to their original positions after being displaced.
  
• INERTIA : This allows the particles to store kinetic energy.
  
• MINIMUM FRICTION : So that the particles oscillate and the wave travels for a sufficiently long time and distance.
  
• these were the properties required for propagation of mechanical waves , so the answer is A and D.

waves can go reflection , refraction and diffraction  like  light being an EM wave performs all these phenomenons.

Water waves are an example of waves that involve a combination of both longitudinal and transverse motions. As a wave travels through the waver, the particles travel in clockwise circles. The radius of the circles decreases as the depth into the water increases.

electromagnetic waves donot require medium for propagation . light is a EM wave.

with change in medium the wavelength and velocity of wave both are changed but being property of source remains constant and doesnot change.

longitudinal waves are propagated by  propagation of energy by particles of the medium.

when reflection of wave takes place from the denser medium then  it undergoes a phase change of $\pi$ . 

mechanical waves  are waves which needs medium for propogation.. energy is transferred  while propagation from particle to particle of medium.