JAMB Physics 1988 Question 35

Which of the following statements is TRUE of ultra-violet, visible and infra-red rays?

1. A.They are all electromagnetic waves with the same wavelength
2. B.Ultra-violet rays have shorter wavelengths than infra-red rays and produce fluorescence
3. C.Infra-red rays have shorter wavelengths than visible light and produce the sensation of heat
4. D.The wavelengths increase in the sequence: visible, ultra-violet, infra-red