What is the arrangement of waves of radiant energy in order of wavelength and frequency called?

The arrangement of waves of radiant energy in order of wavelength and frequency is known as the electromagnetic spectrum. This term encompasses all forms of electromagnetic radiation, which includes a wide range of waves such as radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. Each type of radiation has distinct wavelengths and frequencies, which classify them within the spectrum.

The electromagnetic spectrum is significant because it helps us understand various phenomena related to light and energy propagation, as well as the interactions of radiation with matter. It also underlies many practical applications, from communication technologies (such as radio and microwaves) to medical imaging (like X-rays) and even various scientific studies in fields ranging from astronomy to chemistry.

Understanding the electromagnetic spectrum allows students to grasp how different types of radiation behave and how they can be utilized in technology and science.