“Specific guarantees in the Bill of Rights have penumbras, formed by emanations from those guarantees that help give them life and substance.” An “emanation” refers to a ray of light. During a lunar eclipse, the “umbra” refers to the darkest part of the shadow formed when the Earth orbits between the sun and the moon. The “penumbra” refers to the lighter part of the shadow, where some of the “emanations” from the sun are visible.
