refraction
Seismic, or earthquake waves travel through the earth. They may travel through our crust, which is rocky, or through the more fluid parts, like the mantle, but the medium is the earth.
Seismic waves consist ofP waves which travel through the Earth fast. They compress the medium they travel through;S waves which also travel through the Earth, shearing the solid Earth as they go. S waves do not travel through liquid;Surface waves which can cause the Earth to undulate like water waves or surface waves that cause the Earth to shear.
only through the surface of the earth
Seismic waves
While S waves (shear waves) can travel through earth's solid inner core, they cannot travel through earth's liquid outer core, which surrounds the inner core.So, unless the S waves originated inside the inner core (which seems unlikely) there are no S waves traveling through earth's inner core.
The shadow zone is caused by S-waves as they travel through Earth. S-waves, however, cannot travel through the outer core of the Earth, which is molten. This is because S-waves lose velocity when travelling through a liquid.
The shadow zone is caused by the refraction of seismic waves in Earth's core. P and S waves are refracted (bent) as they travel through different layers of the Earth, leading to a region where they are not detected by seismographs.
P-waves refract as they travel through Earth so do not rach all other pars of the earth's surface. Also S-waves can't travel through liquids and so can't pass through the earth's outer core which also causes a shadow zone.
The dark shadow caused by the moon on Earth is called the umbra during a solar eclipse.
The event caused by the Moon passing through Earth's shadow is called a lunar eclipse. During this phenomenon, the Earth is positioned directly between the Sun and the Moon, blocking sunlight from reaching the Moon and casting a shadow on it. This can result in the Moon taking on a reddish hue, often referred to as a "blood moon." Lunar eclipses can only occur during a full moon.
LUNAR ECLIPSE
the earth blocks the sun and moon
Pressure increases as you travel deeper through the Earth due to the weight of the overlying rocks and materials pressing down from above. This increase in pressure is caused by the gravitational force acting on the layers of the Earth.
A lunar eclipse occurs when the moon passes through Earth's shadow.
A solar eclipse is caused by the moon blocking the sun's light and thus casting a shadow. The moon is orbiting Earth and thus moving relative to it. As the moon moves, so does its shadow.
A solar eclipse is caused by the moon blocking the sun's light and thus casting a shadow. The moon is orbiting Earth and thus moving relative to it. As the moon moves, so does its shadow.
Probably, I mean what else could there be (or the Earth makes a shadow covering the half that doesn't face the sun)