The correct answer is: A. Microwave, infrared, visible, X-rays
Electromagnetic radiation is a form of energy that travels in waves. The waves can have different wavelengths, and the wavelength determines the type of electromagnetic radiation.
The longest wavelengths of electromagnetic radiation are radio waves. Microwaves have shorter wavelengths than radio waves, infrared light has shorter wavelengths than microwaves, visible light has shorter wavelengths than infrared light, ultraviolet light has shorter wavelengths than visible light, X-rays have shorter wavelengths than ultraviolet light, and gamma rays have the shortest wavelengths of all.
The order of electromagnetic radiation in increasing wavelength is:
- Radio waves
- Microwaves
- Infrared light
- Visible light
- Ultraviolet light
- X-rays
- Gamma rays
Option A is the only option that lists the types of electromagnetic radiation in order of increasing wavelength.