Unmanned Air Certification 2025 – 400 Free Practice Questions to Pass the Exam

The choice indicating X-ray, Ultraviolet, and Radio waves correctly identifies three bands of electromagnetic radiation, which, when combined with the other recognized bands, completes the typical classification of electromagnetic spectrum segments.

Electromagnetic radiation is divided into several categories based on wavelength and frequency, and the seven basic bands are typically identified as Radio waves, Microwaves, Infrared, Visible light, Ultraviolet, X-rays, and Gamma rays.

In this context, X-rays and Ultraviolet light are well-known for their higher energy compared to Radio waves, which are considered low energy in the electromagnetic spectrum. This variety reflects the spectrum's diversity in applications, from communication (Radio waves) to medical imaging (X-rays).

The other options do not accurately complete the list of seven distinct bands as effectively as option B does. For instance, while thermal radiation is often associated with infrared, it is not recognized as a separate band but rather a characteristic of a specific wavelength range.