Actually it is circular but usually the sun needs to be quite low in the sky for the angle of the sunbeams hitting the raindrops to be suitable to create a rainbow visible from the ground. But, when that happens, a part of the rainbow is cut-off by the horizon and so it appears semicircular.
Full circles are rare but have been seen/photographed.
semi-circle
A 3D semi circle
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.
No it is a irregular shape
Because the earth blocks you from seeing the full circle. You can use a misting garden hose to make a rainbow, and you'll see it's a full circle.
semi-circle
A 3D semi circle
A rainbow appears as a circle when viewed from an airplane because the observer is seeing the full circular arc of the rainbow due to their high altitude. The shape of a rainbow is actually a full circle, but when viewed from the ground, the bottom half is usually blocked by the horizon. So, from higher altitudes, the full circle can be seen.
No, rainbows are always in the shape of a circular arc due to the physics of light refraction and reflection in water droplets. The shape of a rainbow is determined by the angle at which sunlight is refracted and reflected in the droplets in the atmosphere.
A semi-circle is a two dimensional shape.
A semicircle is a two-dimensional (2D) shape. It is a closed curve that divides a circle into two equal parts, with one straight edge and one curved edge. In contrast, three-dimensional (3D) shapes have depth, width, and height, such as cubes, spheres, and pyramids.
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.
No it is a irregular shape
If you are in a airplane rainbows are actually a circle shape,but from our view it is semi-circle.
Yes.
a rainbow is not shaped like a arc its a circle
Because the earth blocks you from seeing the full circle. You can use a misting garden hose to make a rainbow, and you'll see it's a full circle.