reflectivityn.

1853 J. D. Morell Hist. & Crit. View Speculative Philos. Europe viii. 651 All subjectivity and reflectivity expires in the spontaneity of apperception.

1881 E. Lynn Linton My Love! II. iii. 55 The value of the image is its comprehensiveness,..the facetted quality of its reflectivity.

1946 Jrnl. Philos. 26 Sept. 553 The possibility of these two views arises at a certain moment of human reflectivity, when we abandon the ingenuousness.

1995 Kindred Spirit Sept. 30/2 We should focus on a new set of ‘three Rs’—‘resilience, resourcefulness and reflectivity’—the ability to reflect on and learn from our experience.

1879 Eng. Mechanic 29 207/1 That the effect is due to differences in the reflectivity of different portions of the polished surface..is obvious.

1904 Ld. Kelvin Baltimore Lect. Molecular Dynamics & Wave Theory Light xviii.329 The accompanying diagram, fig. 1, shows..the reflectivities of silver, speculum metal, steel and tin. [Note] I propose the word ‘reflectivity’ to designate the ratio of the whole reflected light to the whole incident light, whether the incident light is unpolarized..or plane polarized..and whether it is ordinary white light, or homogeneous light, or light of any mixed tint.

1916 Physical Rev. 8 152 The reflectivity of metal atoms striking surfaces of the same metals at room temperature (or lower) is zero.

1936 Discovery Aug. 237/1 Steel mirrors of high reflectivity.

1984 Amer. Family Physician 30 201 The acoustic otoscope evaluates middle ear contents by the reflectivity of sound from the tympanic membrane.

1993 S. J. Ettinger Pocket Compan. Textbk. Vet. Internal Med. xvii. 51 Animals have night blindness and altered reflectivity of the tapetal retina.

2005 M. Bjornerud Reading Rocks iv. 142 The warming..would have been partly offset by the cooling caused by the reflectivity of sulfur particles in the upper atmosphere.