REFLECTION n.
The transference of an excitement from one nerve fiber to another by means of the nerve cells, as in reflex action. See Reflex action, under Reflex. Angle of reflection, the angle which anything, as a ray of light, on leaving a reflecting surface, makes with the perpendicular to the surface. -- Angle of total reflecti…
REFRACTION n.
al crystal is said to be optically positive (like quartz), or optically negative (like calcite), or to have positive, or negative, double refraction, according as the optic axis is the axis of least or greatest elasticity for light; a biaxial crystal is similarly designated when the same relation holds for the acute bi…
REPEAT v.
To go over again; to attempt, do, make, or utter again; to iterate; to recite; as, to repeat an effort, an order, or a poem. "I will repeat our former communication." Robynson (More's Utopia). Not well conceived of God; who, though his power Creation could repeat, yet would be loth Us to abolish. Milton.…