Which types of electromagnetic waves have longer wavelengths than visible light?

• A. radio waves and gamma rays
• B. microwaves and infrared light
• C. radio waves and microwaves
• D. X-rays and ultraviolet light

Answer: (C)

The types of electromagnetic waves that have longer wavelengths than visible light include radio waves and microwaves.

Visible light has wavelengths ranging from approximately 400 nanometers (violet) to about 700 nanometers (red). In the electromagnetic spectrum, radio waves, which have wavelengths that can range from millimeters to kilometers, are situated at the longer-wavelength end. Microwaves have wavelengths that range from about 1 millimeter to 1 meter, placing them also beyond the visible spectrum.

Understanding the arrangement of the electromagnetic spectrum is critical in identifying where various types of waves fit in relation to visible light. Both radio waves and microwaves are significant in communications and various technologies, which utilize their longer wavelengths for efficient signal transmission.