The relationship between wavelength and frequency in the electromagnetic spectrum is inversely proportional. As the wavelength increases, the frequency decreases, and vice versa. This phenomenon is described by the equation: \( c = \lambda \cdot f \), where \( c \) is the speed of light, \( \lambda \) is the wavelength, and \( f \) is the frequency. Longer wavelengths, such as those of radio waves, have lower frequencies, while shorter wavelengths, like gamma rays, possess higher frequencies. This inversely proportional relationship underpins various applications in telecommunications and astronomy.