In reality, the shape of rainbow is a circle. The center of the circle is an imaginary line between the center of the sun and the head of the viewer.
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Described in terms of its geometry, a rainbow is an arc of a circle.
Noah's ark sailed underneath the rainbow arcThe huge arc that spread across the sky was rainbow like the ark
The arc in basketball is when you shoot the ball into the hoop. When you shoot it should be an arc shape. When it's an arc shape there is a higher chance of the basketball to go in the hoop.
The shape made inside a circle by an arc and two radii is a sector.
Red, orange, yellow, green, blue, violet, indigo . Seven(7) colours. NB When observing a rainbow in the sky;- Red is always on the outside of the bow. Inigo(blue) is always on the inside of the bow. Outside the red arc, the sky is darker, (light bending) Inside the indigo arc, the sky is lighter, (light bending again). When observing a rainbow, the centre of the rainbow is in a direct line between the Sun(at your back), you and the rainbow centre. NNB The angle from the centre line of the rainbow to the arc is 42 degrees. NNNB A very bright rainbow will produce a reflected rainbow outside the primary rainbow; the colours are reversed.