Written Laser Hair Removal Practice Exam 2026 - Free Laser Hair Removal Practice Questions and Study Guide

The electromagnetic spectrum includes all types of electromagnetic radiation, both visible and invisible. Options A, B, and D are incorrect because they only describe a subset of the types of radiation included in the electromagnetic spectrum. Option A refers to only visible light, option B refers to only invisible light (which includes all types outside of visible light), and option D refers to only ultraviolet and infrared light (which are just two specific types of invisible light). Therefore, the most accurate and inclusive answer is option C, which correctly states that the electromagnetic spectrum includes both visible and invisible light.