Which of the following has a longer wavelength than visible light?

Radio waves have a longer wavelength than visible light because they occupy a portion of the electromagnetic spectrum that extends beyond the wavelengths of visible light. The electromagnetic spectrum is organized from shorter wavelengths (like gamma rays and X-rays) to longer wavelengths (like radio waves).

In this spectrum, visible light typically ranges from about 400 to 700 nanometers (nm). In contrast, radio waves can have wavelengths measured in centimeters to kilometers, significantly exceeding the lengths of those in the visible range. This means that radio waves are a form of electromagnetic radiation with wavelengths that are much longer than those found in visible light, making them suitable for various applications such as broadcasting and communications.