Double Rainbow refers to a viral video posted by Paul “Bear” Vasquez featuring his sighting and reaction to seeing a double rainbow from his front yard just outside Yosemite National Park. In September 2010, Microsoft teamed up with Vasquez for a commercial advertising the panorama stitch feature in Windows Live Photo Gallery to capture a double rainbow in a picture.
Secondary rainbows are caused by a double reflection of sunlight inside the raindrops, and appear at an angle of 50–53°. As a result of the second reflection, the colours of a secondary rainbow are inverted compared to the primary bow, with blue on the outside and red on the inside.
Windows Live Photo Gallery is a photo management and photo sharing application released as a part of Microsoft’s Windows Live initiative.
Image stitching or photo stitching is the process of combining multiple photographic images with overlapping fields of view to produce a segmented panorama or high-resolution image.
A viral video is one that becomes popular through the process of internet sharing, typically through video sharing websites and email.