Infravision

By means of this spell the magic-user enables the recipient of infravision to see light in the infrared spectrum. 

Thus, differences in heat wave radiations can be seen up to 6". Note that strong sources of infrared radiation (fire, lanterns, torches, etc.) tend to blind ar cast "shadows" just as such light does with respect to normal vision, so the infravision is affected and does not function efficiently in the presence of such heat sources. 

(Invisible creatures are not usually detectable by infravision, as the infrared light waves are affected by invisibility, just as those of the ultraviolet and normal spectrums are.) 

The material component of this spell is either a pinch of dried carrot or an agate.