Complex sentence: Light is a carrier of information and a yardstick for measurement; the metre and second are both defined in terms of the properties of light; in everyday life the gravity field and electromagnetic field mediate perception of objective reality.
Split into simpler sentences: Light is a carrier of information and a yardstick for measurement; the metre and second are both defined in terms of the properties of light. In everyday life the gravity field and electromagnetic field mediate perception of objective reality.