Question 12

Visible light is involved when people view a rainbow.

Rainbows are formed when sunlight, which is composed of visible light, is refracted, reflected, and dispersed by water droplets in the atmosphere. This process separates the light into its constituent colors, creating the spectrum that is visible to the human eye.

A) Visible light

Visible light is the correct answer because it encompasses the range of electromagnetic radiation that is perceptible to the human eye. When sunlight interacts with water droplets, it bends and splits into various colors, producing the phenomenon of a rainbow.

B) X-rays

X-rays are a form of electromagnetic radiation that has a much shorter wavelength than visible light and is not visible to the human eye. They are used primarily in medical imaging and do not contribute to the formation of a rainbow.

C) Microwaves

Microwaves are another type of electromagnetic radiation with longer wavelengths than visible light. While they are used in communication and cooking, they do not have the capacity to create visual phenomena like rainbows, which require visible light.

D) Infrared radiation

Infrared radiation is also not involved in the formation of rainbows. It has longer wavelengths than visible light and is primarily associated with heat. As such, it does not interact with water droplets in a way that produces the colorful spectrum seen in a rainbow.

Conclusion

Visible light is definitively the correct answer as it directly relates to the optical phenomena that create a rainbow. All other options—X-rays, microwaves, and infrared radiation—do not fall within the visible spectrum and thus cannot produce the colorful display observed in a rainbow when light interacts with water droplets.