Wiki User
∙ 11y agoAs you go deeper within the Earth, the density and rigidity of the constituent material varies. This affects the speed of the seismic waves, and hence causes them to refract (much light how a light beam refracts when it goes from air to a glass block).
Wiki User
∙ 15y agoThe change in direction of seismic waves occurs due to the differences in the density and composition of the layers within the Earth. When seismic waves encounter boundaries between different layers, such as the mantle and the core, they can refract, reflect, or diffract, causing their direction to change. This phenomenon helps scientists understand the interior structure of the Earth.
Wiki User
∙ 15y agoThis is an attempt at trying to keep the answer as simple and straight-forward as possible - to fully understand the reasoning behind this idea, I recommend reading a good University level textbook on geophysics, such as William Lowrie's Fundamentals of Geophysics. Anyway, here's the jist of it: Seismic waves can be modelled as wavefronts with a general ray that represents the direction in which the wave is travelling (if you are familiar with high-school optics in physics, the concept is essentially the same). When this ray reaches an interface (a boundary between two different types of material), it changes its path: if the medium that it is propagating into allows the wave to travel faster, then the ray refracts (bends) away from the normal (the right-angle intersector to the surface of the interface) - if the wave is going to slow down in the new medium, then it bends towards the normal (This is Snell's law by the way. You can read up on it pretty much anywhere). As the Earth is essentially composed of concentric spheres (lots of spheres that fit inside one another), the waves that propagate through the Earth change direction each time they travel from one layer into another. As a general rule, the deeper one goes into the Earth, the higher the density - and since the velocity of seismic waves is dependant upon the density of the material that it is travelling through (as well the elastic moduli of the material), the velocity increases as density increases. As the wave travels further and further into the Earth, it gets refracted at each interface, always bending away from the normal - until it reaches a limit: as the Earth is a sphere, once you go down deep enough, you start coming out the other end - once you are deep enough, the ray refracts so much that it does not reach the next interface (deeper into the Earth) but instead starts coming out. On the way out, the ray reaches interfaces - each of which slows the ray - and so the ray bends towards the normal. Hence when the number of layers is taken to its limit (to infinity), then the path taken by the ray is essentially a smooth curve.
Wiki User
∙ 12y agoBecause the Earthis made of different composite materials which of the density in each composite material
Wiki User
∙ 11y agoseismic waves traveled in curved path because on entring in earth their medium change and they refrected
Wiki User
∙ 11y agodifferent parts of the earth interior have different densities :)
Wiki User
∙ 11y agoWhether the objects that are being traveled through are dense or viscous.
Wiki User
∙ 9y agoseismic waves change speed as they travel through different materials. they travel through liquids only, that is why no seismic waves are recorded in the outer core
A transverse wave is produced when pushing sharply on the end of a spring toy. In this type of wave, the particles of the medium move perpendicular to the direction of the wave propagation.
a longitudinal wave
A sharp bend is commonly referred to as a hairpin turn. It is a U-shaped curve in a road or trail that sharply changes its direction.
Tugged means to pull or drag something with a quick, sharp movement. It commonly refers to pulling on something forcefully to move it in a certain direction.
The sound made by bringing the palm of one's hands sharply together is commonly referred to as a clap.
The structure of Earth's interior affects seismic wave speed and direction differently at different boundaries. As P waves enter the mantle, they pick up speed until they enter the core, where the wave paths are bent sharply.
MOHO(:
The Moho
it is the mohorovic or the moho
it is the mohorovic or the moho
m to the o to the h to the o
m to the o to the h to the o
The place within the Earth where the speed of seismic waves increases sharply is known as the Moho discontinuity, or Mohorovicic discontinuity. This boundary separates the Earth's crust from the underlying mantle, and seismic waves are thought to speed up due to the change in composition and density between these two layers.
Cause them to turn sharply in a different direction
veers
brake sharply ------------------------------------------------------------- steer in the direction of the skid ( Helpfull )
A point, or a line which does not change direction sharply nor loop back on itself.