question_answer

  Wavelength of radiation incident on a surface is 850 nm. Will the surface become visible when exposed to this radiation? Explain.    

Answer:

                  As we know, the range of wavelength of visible radiation is from 400 nm to 700 nm. The radiation having wavelength greater than 700 nm is termed as infrared radiation which only produces warmth. So the wavelength of radiation 850 nm will not make surface visible on which it is incident.                               (1 +1)