Crown Glass
A silicate glass containing oxides of sodium and potassium, used in compound lenses and spectacles; harder than flint glass, with low index and low dispersion.
See also: Flint Glass, Glass.
Subjects: Chemistry
A silicate glass containing oxides of sodium and potassium, used in compound lenses and spectacles; harder than flint glass, with low index and low dispersion.
See also: Flint Glass, Glass.
Subjects: Chemistry