Our Karandeniya correspondent captured this full circle rainbow, a rare sight yesterday. When sunlight and raindrops combine to make a rainbow, they can make a whole circle of light in the sky. But it’s a very rare sight. Sky conditions have to be just right for this, and even if they are, the bottom part of a full-circle rainbow is usually blocked by the horizon. That’s why people see rainbows not as circles, but as arcs across our sky.