A "Recent Rainbow" refers to a rainbow that has appeared in the sky within the past few hours. It is different from a traditional rainbow that typically appears after a rainstorm, as it can occur without rain or even in clear skies.
"Three supernumerary bows" are additional and faint rainbows that appear on the inner and outer edges of a primary rainbow. They are caused by diffraction of sunlight through water droplets and are more commonly seen in Recent Rainbows due to the smaller droplet size.
Recent Rainbows can occur without rain because they are formed by the diffraction of sunlight through water droplets, similar to traditional rainbows. However, these droplets may be smaller and more numerous, making them invisible to the naked eye but still able to create a rainbow effect in the sky.
Recent Rainbows are not necessarily rare, but they are less common than traditional rainbows. They are more likely to occur in areas with high humidity, such as near bodies of water, and during certain times of day when the sun's angle is low.
Yes, Recent Rainbows can be captured in photographs, but they may be more difficult to see in the image compared to traditional rainbows. They may appear as faint and subtle arcs of color, rather than a bright and distinct rainbow.