becaz the critical angle of rainbow is so large......
Because at every point IN the rainbow, the angle between the direction to the sun and the direction to your eye has to be the same angle. The only bunch of points that can satisfy that requirement is a bunch of points that are all on the same circle.
A rainbow occurs when sunlight is refracted, or bent, and reflected inside water droplets in the atmosphere. The angle at which the light is refracted and reflected causes the different colors of the spectrum to be visible. The height of the raindrop determines the size of the rainbow, but typically rainbows are seen forming a semicircle with a radius of about 42 degrees.
No, red is not always the top color of a rainbow. The order of colors in a rainbow, from top to bottom, is red, orange, yellow, green, blue, indigo, and violet. The position of red at the top is due to the way sunlight is refracted by raindrops to create a rainbow.
No, rainbows form a full circle, but we only see a semicircle due to the horizon blocking the bottom half. The shape of a rainbow depends on the observer's position relative to the sunlight and water droplets that create it.
No, you do not always see a rainbow when it stops raining. For a rainbow to appear, the conditions must be right, such as sunlight and rain at the same time, with the sun at a low angle in the sky behind the observer.
Semicircle
Arc would be my best guess. An arc is like the shape of a rainbow.
A rainbow forms a semicircle because it is created by the refraction, reflection, and dispersion of sunlight through raindrops in the atmosphere. The circular shape occurs because the angle of reflection and refraction is consistent for all raindrops within a specific range, resulting in a semicircular arc of color.
A rainbow is a circle. What we see from almost any point on earth is a semicircle, or just a part of the rainbow. We can only see it from horizon to horizon, or just an arc of the whole rainbow. Occasionally we can see a full circle of a rainbow in the sky surrounding the sun, and sometimes multiple ones.
A rainbow is a circular arc of light that forms when sunlight interacts with raindrops in the atmosphere. The size of a rainbow can vary, but they are typically seen as a semicircle with a diameter of around 42 degrees centered on the antisolar point.
Yes, that is the definition of a semicircle.
A rainbow forms a circular arc due to the refraction, reflection, and dispersion of sunlight in water droplets in the atmosphere. It appears as a semicircle or full circle when observed from above, such as from an airplane or an elevated location.
Rainbows are actually full circles, but we usually only see a semicircle due to the ground blocking the bottom half. So, a rainbow doesn't have an end, but it appears to end because of our perspective.
No, a semicircle is not a quadrilateral
A rainbow results from sunlight passing thru raindrops that results in a prism effect that makes a complete circle. You only see a semicircle because of the horizon, but from an air plane you would see the full circle
Because at every point IN the rainbow, the angle between the direction to the sun and the direction to your eye has to be the same angle. The only bunch of points that can satisfy that requirement is a bunch of points that are all on the same circle.
The possessive form is semicircle's.