JAMB - Physics (1988 - No. 27)
Which of the following statement is TRUE of ultraviolet, visible and infra-red rays?
they are all electromagnetic waves with the same wavelength
ultra-violet rays have shorter wavelengths than infra-red rays and produce flourescence
infrared rays have shorter wavelength than visible light and produce the sensation of heat
the wavelenghts increase in the sequence: visible, ultra-violet, infra-red