Lightning has more energy than the radio because gamma rays have a shorter wavelength.
In the electromagnetic spectrum, gamma rays have a much shorter wavelength compared to radio waves. Shorter wavelengths correspond to higher energy according to the equation \(E = \frac{hc}{\lambda}\), where \(E\) is energy, \(h\) is Planck's constant, \(c\) is the speed of light, and \(\lambda\) is the wavelength. Therefore, gamma rays, which are emitted during lightning, have much higher energy than radio waves.