Show use UM of cf rays ray by flowers flower do flowers flower use rays not visible to the human eye to attract insects to them certain insects can spot ultraviolet light that cannot be seen by man an and d some blossoms in addition to their ordinary bril lift hues vary in the kind of short light rays that they emit prof F K of cornell university told the optical society of america meeting at the bureau ot of standards in washington recently that these theme invisible rays may guide pollen bearing insects to the flowers in their search for honey giving signals in rays shorter than the deepest violet that we can see brings the flowers the pollen that eliat Is necessary to it in pro ducles seed experiments made by professor on colorado flowers show allow that flowers apparently differ in their reflection of ultraviolet As aa much its as in their visible colors |