What is a Rainbow?+50 
A rainbow is a natural arc of colors that appears in the sky when sunlight shines through raindrops. The light bends, or refracts, and splits into its different colors, creating a beautiful spectrum. Typically, a rainbow displays red, orange, yellow, green, blue, indigo, and violet. Rainbows are often seen after rain showers when the sun is low in the sky, serving as a colorful sign in nature.
What is a Rainbow?+50
A rainbow is a natural arc of colors that appears in the sky when sunlight shines through raindrops. The light bends, or refracts, and splits into its different colors, creating a beautiful spectrum. Typically, a rainbow displays red, orange, yellow, green, blue, indigo, and violet. Rainbows are often seen after rain showers when the sun is low in the sky, serving as a colorful sign in nature.
💡 Key Takeaways
- Understand how sunlight and raindrops create a rainbow through refraction, reflection, and dispersion.
- Identify the colors of the rainbow in order from red to violet.
- Explain why rainbows appear as arcs and how sun position and rainfall influence visibility.
- Differentiate between primary and secondary rainbows and why color order changes in a double rainbow.
❓ Frequently Asked Questions
What is a rainbow?
A rainbow is an optical phenomenon caused by sunlight being refracted, reflected inside water droplets, and dispersed into a spectrum of colors in the sky.
How does a rainbow form?
Light enters a raindrop, refracts (bends), reflects off the inside of the drop, and refracts again as it exits. Different wavelengths bend differently, creating the colored arc seen opposite the Sun.
Why are the colors in a rainbow ordered red to violet?
Different wavelengths bend by different amounts; red bends the least and violet the most, so red appears on the outer edge and violet on the inner edge of the primary rainbow.
Do you need sun and rain to see a rainbow?
Yes. You need sunlight and raindrops in the air, and the rainbow appears opposite the Sun at about a 42° angle.