Which of the following statement is TRUE of ultraviolet, visible and infra-red rays?

• A.they are all electromagnetic waves with the same wavelength
• B.ultra-violet rays have shorter wavelengths than infra-red rays and produce flourescence
• C.infrared rays have shorter wavelength than visible light and produce the sensation of heat
• D.the wavelenghts increase in the sequence: visible, ultra-violet, infra-red
• E.