2019 · Q60
If the wavelengths corresponding to ultraviolet, l visible and infrared radiations are given as , UV l and l respectively, then which one of the VIS IR following gives the correct relationship among these wavelengths?
General KnowledgePhysics
- Al < l < l UV IR VIS
- Bl > l > l UV VIS IR l l l
- C> > UV IR VIS
- Dl < l < l UV VIS IR
Explanation
In the electromagnetic spectrum, ultraviolet radiation has shorter wavelengths (about 10-400 nm) than visible light (about 400-700 nm), which in turn has shorter wavelengths than infrared radiation (above about 700 nm). The correct order is therefore lambda(UV) < lambda(VIS) < lambda(IR). Hence option D is correct.