The slower propagation of light in gas or water than in air or vacuum may be attributed to a greater density, or to a less rigidity, in the former case; or we may adopt the more complicated supposition that both these quantities vary, subject only to the condition which restricts the ratio of veloci
restricts הגייה עם משמעויות, מילים נרדפות, הפכים, תרגומים, משפטים ועוד