i) The earth has two holes at the top and bottom.
ii) Viewed from on top in Google Earth, it looks like a giant eyeball.
lol. Apparently they clip the sat images at both poles. So all that's displayed there is a BIG black hole.

Behold the eye-ball.
refraction :
The process by which the direction of light changes as it passes obliquely from one medium to another in which its speed is different.
angle of refraction :
The angle between a refracted ray and a line perpendicular to the surface between the two media at the point of refraction.
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