I saw this double rainbow walking home from work today. Notice the faint secondary rainbow above the main one, with reverse colors as predicted by geometric optics. The region in between the rainbows is called “Alexander’s band”. You can read the wikipedia post on rainbows here.
Double rainbow over NTU sports complex
We’ve had the driest January in 10 years in Singapore, according to newspaper reports. January is normally a very wet month due to the Northeast Monsoon. The lack of rain is showing every where: grass is brown, the trees along the motorwars look barren, and the Seletar reservoir, which I pass by once a week, is looking drained.
Today it rained, a good old-fashioned downpour with lightning. I grabbed two pictures, with and without Wide Dyn. Range, with my innov8 phone. Once again, the WDR feature made a big difference. According to the EXIF header, the exposure time is the same for both frames, though the ISO is higher (1660) for without than for with (1220). There is significant row-wise noise visible in the images.
Rain at NTU, without WDR
Rain at NTU, with WDR on