The diagram below shows a subduction zone where oceanic crust is sinking into the mantle underneath continental crust as two
tectonic plates converge. as subduction occurs, high pressure and high temperature conditions result.
oceanie crust
continental crust
lithosphere -
lithosphere
asthenosphere
oceanic continental convergence
image courtesy of usgs
which of the following natural resources is most likely to be found in an area where subduction has occurred in the past?
a.
solar energy
b.
fresh water
c. hardwood lumber
d. metal ores
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you have to draw the persons position over there

magnified images possible images can be real = projected onto a screen

small = small current large mag large current

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.