The shape of the Earth is __________ . Fill in the blank.
Answers
Oblate-spheroid.
An ellipsoid or a spheroid is a quadric surface that rotates on an ellipse on one of its principal axes.
It is actually an ellipsoid that has two equal semi-diameters.
An ellipsoid has a circular symmetry.
If an ellipse is rotated on its major axis, the outcome is a prolate spheroid.
It will be shaped like a rugby ball or an American football.
If an ellipse is rotated on its minor axis, an oblate spheroid is the result that is like a lentil.
If the happening ellipse is a circle, then a sphere will be formed.
Because of the mixed effects of rotation and gravity, the Earth's figure is not exactly a sphere.
It is marginally flattened towards the direction of its rotation axis.
Due to this reason, the Earth is usually termed as an oblate spheroid rather than a complete sphere.
राजाभाऊ झकास शकतो नमस्कार वाढत्या
ds