English: Image showing rays emitted by body A in the direction of body B. When bodies A and B are point like, all rays from A must be incident on B. When bodies A and B are extended, some rays from A will not be incident on B and may eventually return to A.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.