Consider the statements:
1. Primary waves totally disappear in the core region revealing that outer core is made up of liquid.
2. Secondary waves show changes in its speed as it travels from magma chamber to lithosphere region indicating difference in density.
3. The speed of secondary waves is highest inside the Earth’s Core region indicating highest density in the Core region.
Choose the correct statement/s:
Consider the statements:
1. Primary waves totally disappear in the core region revealing that outer core is made up of liquid.
2. Secondary waves show changes in its speed as it travels from magma chamber to lithosphere region indicating difference in density.
3. The speed of secondary waves is highest inside the Earth’s Core region indicating highest density in the Core region.
Choose the correct statement/s:
The correct option is B 2 only
Primary waves (P-waves) are compression waves that are longitudinal in nature. These waves can travel through any type of material, including fluids, and can travel at nearly twice the speed of S waves. Thus will not disappear in the core. But S waves do disappear in the core region.
Secondary waves (S-waves) are shear waves that are transverse in nature. S-waves can travel only through solids, as fluids (liquids and gases) do not support shear stresses. S-waves are slower than P-waves, and speeds are typically around 60% of that of P-waves in any given material. S waves speed varies with density just like P waves and this speed increases with increasing density. Since there is density difference between lithosphere and magma chamber the speed of the S waves do change.
S waves do not enter the Core region as the outer core is made up of liquid.
2 only
Primary waves (P-waves) are compression waves that are longitudinal in nature. These waves can travel through any type of material, including fluids, and can travel at nearly twice the speed of S waves. Thus will not disappear in the core. But S waves do disappear in the core region.
Secondary waves (S-waves) are shear waves that are transverse in nature. S-waves can travel only through solids, as fluids (liquids and gases) do not support shear stresses. S-waves are slower than P-waves, and speeds are typically around 60% of that of P-waves in any given material. S waves speed varies with density just like P waves and this speed increases with increasing density. Since there is density difference between lithosphere and magma chamber the speed of the S waves do change.
S waves do not enter the Core region as the outer core is made up of liquid.
