BUFFALO, NY ( WKBW ) After storms rolled through Western New York Sunday, a rainbow appeared just before dark. This image was captured by Ray Feness.
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Broadcast meteorologist Jennifer Stanonis, Chief Meteorologist Mike Randall, and Meteorologist Aaron Mentkowski will keep you up to date with the latest conditions from the AccuWeather Lab on Channel 7's Eyewitness News, and here at wkbw.com.
Monday: A chance of showers, mainly before 2pm. Mostly sunny, with a high near 71. West wind between 13 and 16 mph. Chance of precipitation is 30%.
Monday Night: Partly cloudy, with a low around 56. West wind between 6 and 14 mph.
Tuesday: Mostly sunny, with a high near 77. Southwest wind between 8 and 15 mph.
What causes a rainbow to appear? The Channel 7 AccuWeather team at WKBW.com went to WeatherQuestions.com for the answer:
What causes rainbows?
Rainbows are caused by the splitting of white sunlight into it component colors by raindrops. Some of the light that falls on a water drop enters the drop. As it enters the drop, the color components of the sunlight are refracted (bent) by different amounts depending upon their wavelength (we perceive the different wavelengths as different colors.)
Then, the different colors reflect off the back of the inside of the drop, and when they pass through the front of the drop again, they are refracted once again.
A rainbow is always directly opposite the sun from the observer's perspective. This explains why rainbows are only seen when the sun is low in the sky, usually in the late afternoon (in which case the rainbow will be seen to the east of the observer), or early morning (in which case the rainbow will appear to the west of the observer).
If the observer could see the shadow of his head cast by the sun, it would be in the exact center of a circle where the rainbow forms the top portion of that circle.