Let's analyze each statement about secondary rainbows: (a) A secondary rainbow appears above or outside a primary rainbow: TRUE. The light forming the secondary rainbow emerges from the raindrop at a larger angle (around 50-53 degrees) compared to the primary rainbow (around 40-42 degrees), placing it outside the primary bow. (b) The secondary rainbow is always fainter than the corresponding primary rainbow: TRUE. The secondary rainbow is formed by two internal reflections (compared to one for the primary), leading to more light loss and diffusion, making it less intense. (c) The orders of colours of primary rainbow and secondary rainbow are opposite: TRUE. The extra internal reflection in the secondary bow reverses the color spectrum. Primary: Red (outer) to Violet (inner). Secondary: Violet (outer) to Red (inner). (d) A secondary rainbow is only a refraction of a primary rainbow: FALSE. Both primary and secondary rainbows are optical phenomena resulting from both refraction and internal reflection(s) of sunlight by raindrops. The secondary rainbow is not a refraction of the primary rainbow, but rather a separate phenomenon occurring simultaneously due to a different number of internal reflections in the same raindrops.