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mrinmoymahapa
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Why rainbow formed ?
Rainbows are caused by the refraction and reflection of sunlight through water droplets in the air. When light enters a water droplet, it is refracted (bent) and then reflected off the back of the droplet before exiting. This process separates the white light into its component colors, creating a rainbow.
Rainbows appear as an arc because the water droplets that create them are spherical in shape. This means that the light is refracted and reflected at different angles as it passes through each droplet, causing the rainbow to appear as an arc in the sky.
Rainbows can only be seen when there is sunlight and water droplets present. This is why they are most commonly seen after a rainstorm during the day. However, it is possible to create rainbows using artificial light and water droplets, so they can be seen indoors as well.
All rainbows follow the same color pattern, from red on the outer edge to violet on the inner edge. However, the intensity and brightness of the colors may vary depending on the size and shape of the water droplets, as well as the angle of the sunlight.
Double rainbows are not as common as single rainbows, but they are not considered rare. They occur when light is reflected twice within a water droplet, creating a secondary rainbow outside of the primary one. The colors in a double rainbow appear in reverse order with the secondary rainbow being dimmer than the primary one.