Assertion: eyepiece | /r/ObjectUse | used as lens
Facets:
Source sentences:
text: This problem also stems from the fact that lenses do not bring all colors of light to the same focal point, but lateral color involves a different consequence of that fact than does longitudinal color: If an eyepiece, used as a lens, does not bring all colors of light to the same focal point, it follows that the focal length of that eyepiece will vary with color, and consequently, that magnification will vary with color.