2007-10-09 05:35:01 · 4 answers · asked by ? 5 in Science & Mathematics ➔ Weather
The intensity of the sun shining on the rain droplets is one factor, but also the darkness of the sky behind the rainbow can make a big difference in the apparent brightness
2007-10-09 05:44:41 · answer #1 · answered by dogsafire 7 · 1⤊ 1⤋
If the incident solar radiation(which is reflected by the rain drops) is very bright, the rainbow will also be bright.The sun's rays will be brighter , if it is not much attenuated in the atmosphere by the dust like particles.The background of the rainbow also counts.
2007-10-11 07:02:14 · answer #2 · answered by Arasan 7 · 1⤊ 1⤋
This is a good question. My suspicion is that it is largely due to the size distribution and density of the drops as well as the effective transmission of the sunlight through the atmosphere before it encounters the rain.
2007-10-09 12:48:24 · answer #3 · answered by 1ofSelby's 6 · 0⤊ 1⤋
This is due to the sun being at a higher angle of insolation (IN coming SOLAr RadiATION). Also the sun is much stronger and the Ultra Violet Index is higher.
2007-10-10 21:02:14 · answer #4 · answered by Anonymous · 0⤊ 1⤋