Does a rainbow form only after it rains?

Answer 1

NO!!! Not after!!!!! However, the rainfall can be very localised. So where you are standing , there may be no rain , or it has just passed over. However, you can see the rain falling in the distance.

A Rainbow forms during rainfall, and the sun shining through the rain.

The beams of sunlight are split by the raindrops.

When you see a rainbow.

Stand with your back to the Sun . A straight (imaginary) line from the Sun, through you, will take you to the centre of the rainbow. .

From this line through you, an angle forms of ~42 degrees to the coloured bow.

The outer edge of the bow is Red , with the Indigo on the inside. . This is due to the Red having a longer wavelength , than the Indico.

The colour order is , red, orange, yellow, green, blue , violet, and indigo.

If you see a double rainbow, it will be on the outside of the first rainbow, and the colours reversed. Much more rarely a triple rainbow, outside again, with the colours reversed back to their original order.

In the U.K.(England) they are very good weather forecasters for the day.

If seen in the morning, it means that there will more rain thatday.

Conversely, if seen in the evening it means there will be no more rain that day.

Sir Isaac newton , he of Gravity fame, split up white light into the colours of the rainbow, and recorded it in a treatise named ' Optics'.

Answer 2

Rainbows form when sunlight is refracted, reflected, and dispersed in raindrops, creating a spectrum of colors. While rain can create the necessary conditions for rainbows to form, other factors like mist, dew, or the spray from a waterfall can also produce rainbows.

Answer 3

no if it is really humid in the air it can sometimes i look at cloudds and see them also if you take a hose and aim it just right you can see a rainbow