Question

which wave on the electromagnetic spectrum has the longest wavelength? gamma ray visible light radio

Explanation:

Step1: Recall electromagnetic spectrum properties

The electromagnetic spectrum ranges from radio waves (longest wavelength, lowest frequency) to gamma rays (shortest wavelength, highest frequency).

Step2: Compare given options

Gamma Ray has a very short wavelength. Visible light has a wavelength in the range of \(400 - 700\) nm. Radio waves have much longer wavelengths (meters or even kilometers in some cases).

Answer:

Radio