JAMB - Physics (1986 - No. 21)
In which of the following arrangements is the wavelength in an increasing order?
Gamma rays, infra-red rays, x-rays, radiowaves
Gamma rays, x-rays, infra-red ray, radiowaves
Radiowaves, x-rays, gamma ray, infra-red rays
Infra-red rays, radiowaves, x-rays, gamma rays