Relatively speaking, do high-frequency waves have long wavelengths or short wavelengths? Name an electromagnetic wave with higher frequency than blue light.

short wavelength.

indigo wave.

Explanation:

Greater the frequency of the wave greater will be the energy of the wave.

because E = hυ.

E∝h

High energy wavelength emit shorter wavelength and low energy wave emit longer wavelength.

electromagnetic wave with higher frequency than blue light is indigo light in the visible range.