The firmament is the clear dome that is above us. It seperates the waters above us frombelow. The clear & reflective properties create the true prism that refracts and reflects large dome shaped rainbows into the opposite direction of the sun onto raindrops. This dome explains many other “phenomena” but this is what creates the 24hr days & triple sun. If you take a reflective bowl & a lighter holding it upside down you’ll see when the light source is closest to the edge it creates a reflection on both right & left side, hence the triple sun, this light accounts for the extra 4-8 hours of sunlight