light bow window - a photo on Flickriver

light bow window

To see a rainbow we need sunshine and falling rain. Rainbows are rarer than might be thought. In any one place in rainy England there are fewer than ten bright ones in a year. Halos occur much more frequently.

Early morning and late afternoon are the best times to see them because the sun must not be too high. Rainbows are always opposite the sun and their centres are below the horizon at the the antisolar point. The lower the sun the higher is the bow.

Red is always outermost in the primary bow with orange, yellow, green and blue within. Occasionally, when the raindrops are small, fainter supernumerary arcs of electric greens, pinks and purples lie just inside the main bow.

A rainbow is not just a set of coloured rings. The sky inside is bright because raindrops direct light there too. The primary bow is a shining disk brightening very strongly towards its rim.

from www.atoptics.co.uk/rainbows/primary.htm

Taken on: May 22, 2014

Tags:

bow

rainbow

rain

ireland

cork

corcaigh

wet

red

orange

yellow

green

blue

indigo

violet « less

Sets appears in: • Rainbows • Interestingness

Camera: Nikon D5000, f/5.6, 1/125 sec, 55mm (=82mm), ISO 280 (more info) (hide info)

Camera:	Nikon D5000
Lens:	AF-S DX VR Zoom-Nikkor 18-55mm f/3.5-5.6G
Aperture:	f/5.6
Exposure Time:	0.008 sec (1/125)
Focal Length:	55mm (35mm equivalent: 82mm)
ISO:	280
Exposure Bias:	0 EV
Flash:	Auto, Did not fire
Exposure Program:	Not Defined
Exposure Mode:	Auto
Metering Mode:	Multi-segment
White Balance:	Auto
Color Space:	sRGB
Software:	iPhoto 9.5.1
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