Answer:smosis is the diffusion of water across a semi-permeable (or differentially permeable or selectively permeable) membrane.
Explanation:
<span>A light ray is one narrow beam of light traveling in a straight line. </span>It is the most basic element in geometrical optics. <span>A light ray is an idealized and hypothetical model of a light that is used to better explain the propagation of light. In reality, light travels as a wave and can therefore be bent.</span>
