The true options about a rainbow are,
- sunlight slows down as it enters water droplets in the sky.
- Rainbows are a type of interference pattern.
- Refracted Sunlight makes the arc in the rainbow.
How are Rainbows are a type of interference pattern?
Each bright band is colored differently, resulting in a miniature rainbow, since different colors of light have slightly distinct patterns of interference due to their varied angles of refraction. When raindrops are uniformly sized and tiny, supernumerary rainbows are most visible.
When light strikes water droplets, an arc of many colors is created. A rainbow is a meteorological phenomena caused by light scattering, refraction, and reflection in water droplets. It manifests as a spectrum of light in the sky. It appears as a multicolored, circular arc. The region of the sky directly opposite the Sun is where rainbows caused by sunlight consistently appear.