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Secondary rainbows are caused by a double reflection of sunlight inside the raindrops, and are centered on the sun itself. They are about 127Â° (violet) to 130Â° (red) wide. Since this is more than 90Â°, they are seen on the same side of the sky as the primary rainbow, about 10Â° above it at apparent angles of 50â53Â°.
No. In fact, total internal reflection of sunlight is impossible inside a spherical raindrop. Rainbows are caused by the combined effects of refraction and (not total) int â¦ ernal reflection, which concentrates the light near deflection angles of 40 to 42 degrees.hen two colors reflection occur inside a raindrop at such angle that it results into secondary rainbow. When weaker light that start emerging to produce a dimmer rainbow effect.   Refraction happens as light enters and leaves a prism. Red light is refracted the least and violet light is refracted the most.