Polar covalent molecules<span> exist whenever there is </span>an<span> asymmetry, or uneven distribution of electrons in a </span>molecule<span>. </span>One<span> or </span>more<span> of these asymmetric atoms pulls electrons </span>more<span> strongly </span>than<span> the </span>other<span>atoms. For example, the </span>polar<span> compound methyl alcohol has a </span>negative<span> pole made of carbon and hydrogen and a positive ...</span>
Answer:
The first of the basic laws of geometric optics is the law of rectilinear propagation of light. It reads: in an optically homogeneous medium the ray of light propagates in a direction.
I would have to go with social learning
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