Final answer:
If an object has a long wavelength, it means it has low electromagnetic energy.
Step-by-step explanation:
If an object has a long wavelength, it means that it has low electromagnetic energy. Wavelength is the distance between consecutive crests or troughs of a wave. In the electromagnetic spectrum, longer wavelengths correspond to lower energy levels, while shorter wavelengths correspond to higher energy levels. For example, radio waves have long wavelengths and therefore low energy, while gamma rays have short wavelengths and therefore high energy.
Learn more about Wavelength and electromagnetic energy